How does Netflix recommend movies? Matrix Factorization

[@computerguycj1]

Sir, I've seen almost all of these concepts painfully "explained" in many different ways, but never have I seen them presented as elegantly and intuitively! Excellent video!

[@conintava514]

So informative and easy to follow. I love this. Thank you so much for taking the time to create this video. It's so important to know how the concepts we learn in class can be applied in real life. This has changed everything for me. Thank you again.

[@anushkagupta79]

I read so many articles about this topic but was never able to understand. You made it all so easy. Excellent work!!!

[@shivanshkaushik383]

This is a work of art. Never thought matrix factorization could be explained so effortlessly yet so clearly. You have helped me a lot with this sir! Thank You, God bless you!

[@atulitraopervatneni9320]

You are one of best teachers on KZbin. Thanks

[@reyhanehhashempour8522]

Luis! You are a fantastic teacher! Not everyone can explain complicated concepts in a way that every body understands. Your teaching style shows the depth of your knowledge! Thank you!

[@AmeyPanchpor02]

Really this is one of the best introductory video i have found. Knowledge + simple understanding examples = Gives very good understanding of topic.

[@kevdaag2523]

That was great the way you explained matric factorization and then turned it into an explanation of ML.

[@ws-ob4wy]

I find your teaching method not only to be great but also very valuable to motivate young people to take up Machine Learning. You could make it even better by also relating it to the math (Linear Algebra, Calculus, Probability) in a more familiar form. Make sure that anyone teaching and learning ML in a college environment will be aware of your videos. Great stuff.

[@Xraid32]

Sharknado = Twister + Jaws. This was gold. That was the moment all of Machine Learning made sense.

[@ianboard544]

It sounds like a pitch you might make to a production executive.

[@AmeyPanchpor02]

Very true

[@SajjadZangiabadi]

The instructor does an excellent job of breaking down concepts and explaining them step by step in a way that is easy to understand. I appreciate the time and effort put into creating such an informative and well-presented video. Thank you for sharing your knowledge with us.

[@VatsalaNundloll]

By far, one of the best videos on Matrix Factorization! I was looking for a good explanation on this and instantly clicked on this video as soon as I saw it was from Luis. Luis, you are a fantastic teacher!

[@killuawang677]

This video deserve 10x more likes. I got to say it is so much better than Google's own recommendation system crash course...

[@hcordioli]

Luis, this is the best explanation I´ve ever seen, not only about Recommendation Systems, but basic concepts like Gradient Descent, Loss Function, Matrix Factorization, etc. Congartulations for your didatic way, and thanks for sharing !

[@glencheckisthename]

I searched about 20 videos and blogs, this is the best explanation about FM

[@SurajAdhikari]

Thanks Luis. This is one of the first videos I watched on Matrix Factorization and I understood them really well. Great job. Keep posting.

[@UmeshRajSatyal]

Well explained and very easy to understand. Stopping here to thank you.

[@amanzholdaribay9871]

WooooW! That has been as simple as possible! If person understands something, he can be able to explain it even to the child - I mean level of understanding is amazing! Thank you!

[@sarthaktiwari1889]

It is one thing to have a great hold over technical concepts and another thing to be able to explain them. You have both. Very well explained!!!

[@fernandobezerra4040]

THE BEST VIDEO ABOUT MATRIX FACTORIZATION EVER! CONGRATULATIONS, TEACHER!

[@gobbledee55]

Wow... you did an outstanding job of explaining this topic. Thank you for this. It was very clear, concise, and the graphics were spot on and helped visually everything. Visual learners are all thankful for this presentation :D

[@mingman753]

OMG this is wonderful. My mother tongue is not English but this lecture is much better-understanding than others in my language. I logged in to 'like' this video. Thank you so much for your video!

[@MohitJaggi-f8h]

Nicely explained. Small nit: you say square to avoid ambiguity between positive or negative which is a misleading simplification. The reason to do that is to avoid the errors from canceling each other out when you add them up for all ratings. That is indeed the step you show next so easy to add an accurate explanation

[@ultraviolenc3]

Great video! So much easier now to comprehend more complicated material after your explanation

[@chandanroy1789]

Great explanation! I was looking for something cool and simple to refresh my past learnings.

[@sumitchhabra2419]

I haven't come across any video on internet with such an intuitive explanation. Loved it!!!

[@dayan5402]

Real-life application + theory in simple terms. Very nice! Thank you!

[@spikeydude114]

You really did a great job of distilling what I saw as a complex topic to something practical and understandable. Great video!

[@shelllu6888]

honestly the best video I've seen to explain matrix factorization. Thank you so much!

[@vinaysingh6664]

I really like the way you explained this concept in so simple words. At best what we do at deep levels comes from what we learn at the basics and clearing those is the most important thing, and I guess you took really good care of that. Again Thank you for this great resource. :)

[@nguyenhiep6639]

Thanks for your full explain inaction. It helps me really much to understand my project

[@jackshi7613]

Well explained concepts, really appreciate your nice video

[@黃煜棋-f3h]

It is so easy to understand such a difficult concept. You must be a great teacher. I like this kind of video very very much. Thanks a lot.

[@premkumarpathare]

One of the best explanation about matrix factorisation. Once understand you can't forget.

[@penguinmonk7661]

If you are areading this, you perhaps found the missing link in your ML knowledge, I sure as heck know I have, so don't pass up on it. Watch at least the first 15min. Praise: I am a CS Academic chair with a specilization in security and Distributed systems. Never have my peers in Machine learning/ AI truly explained to me why this works. I just knew it had to do with mathematics, and I knew how to use the software modules. I could implement them line by line and turn math found on wikipedia or textbooks into code. I have even been part of a research effort into self learning robots using hyperNEAT. From the bottom of my heart: THANK YOU. I finally understand how this works. Its been 3 weeks now and this entire fields has been opened up for me, I look at it with such different eyes and so much more appreciation and wonder. THANK YOU.

[@MmahamRroblox]

Tutor gave a clear understanding of matrix factorization. Also, even though this lecture was not about hyper parameters and gradient descent, but first time I got clear understanding of these two concepts.

[@andis9076]

Man, YOU'RE GOOD ! I rarely see a video that explain things so clearly like yours !

[@tejaswi1995]

Wow. Great content. Latent features concept got so clear after watching this!

[@sidagarwal43]

Very clear and lucid explanation. Thanks

[@nikhilbelure]

elegantly explained. like the description very friendly introduction. I was struggling to see how matrix factorization plays role in recommendation system. no I got it Thanks

[@nnslife]

Great video! I rarely assign this kind of title to a video, but this was really great: easy and detailed at the same time! Once you put matrices like at 13:23, I was like: wow, this is how matrix multiplication should be introduced in colleges! Even many years later and with a good understanding of linear algebra, this adds so much intuition.

[@vishalmendekar7006]

One of the best video explaination i found till now. Everything is crystal clear with real examples. Thanks alot for posting the video

[@nguyenkimtrang9525]

30 minutes gold ~ the best explaination ever! Respect! Many thanks to you!

[@ruchitchudasama1407]

This video blew my mind. I never imagined that the matrix multiplication that we learnt in high school could find such a huge application.

[@shamim-io]

Sir you are truly a great teacher. Such a beautiful presentation. U made the concept so simple. Very much grateful to you. Please keep making videos.. Love from india !!

[@krishnaKumar-zi6ct]

Superb presentation! u have simplified and explained the concept so well...clear flow, great visuals. Thank you very much Luis!!

[@blackstallion9605]

This is amazing, it has really opened my mind. Thank you so much

[@nikhithasagarreddy]

Super sirr, every class is very clear ,, there are only few classes available. Please upload every class sir,,😘😘😘

[@phaniramsayapanen5890]

Great explanation, you seem to understand the concept very clearly. Subscribed immediately! any videos on expectation maximization, svd, dimensionality reduction ? or resources that you liked most ?

[@jonlenescastro1662]

Definitively the best explanation on YT

[@renemartinez3014]

Excellent video. A little bit slow pace but thanks to it there´s little space for doubts or misunderstanding. Great job.

[@kamalamarepalli1165]

What a visual treat to understand the logic and concept behind....soo good and very well explained.

[@codingpineappl3480]

Best video, you can find about matrix factorization. Thanks a lot

[@abhishekrupakula1613]

Thank you so much Luis. Very well explained.

[@armasaaf6180]

thank you for making it easy to understand. Great job!

[@vulkanosaure]

Thanks so much, it's extremely well explained, better than other things I saw on this topic. The stucture of the NN that solves this is clear in my mind noW

[@mkamp]

Absolutely wonderful. Thanks for taking the time to slow walk us through it.

[@dhruvbarot]

Awsome , simple , mindblowing .... both explanation and presentation

[@derekhe6816]

Thank you so much for this video. Your teaching style is great and you presented all the information comprehensively but simply that I feel like I have a much greater grasp of the concepts. Here are 2 suggestions: perhaps invest in a microphone that gives you clearer sound, because currently I have to turn the headset way up and the levels are too high that it can kind of hurt. Also, if you could spend more time at the end writing out general formulae of the algorithm like Andrew Ng, that would be nice. Once again, thank you so much for this video!

[@shahnawazhussain7506]

WOW. How simply explain it. Great Video.

[@raphaeldayan]

PERFECT VIDEO! YOU ARE THE BEST! So easy to follow, so clear, thank you

[@peaceandlov]

Best video ever. Thanks mate.

[@shaikhmosakib604]

What A Explanation Dude, Thank You So Much

[@carlitos5336]

THANK YOU. Best explanation ever.

[@giangpham6044]

Well explained and very easy to understand. Thanks you

[@TejasPatil-fz6bo]

This video made my day...thanks Prof. Luis

[@sajadkarim]

Many thanks for the video. It was really helpful and the way you explained the concept is outstanding. 101/100!

[@karannchew2534]

Hi Serrano, A suggestion please. Before walking through a detailed example, please first introduce the overall concept/algorithm/intuition, and, the content/agenda. First tell the learner what they would expect to see/learn, then start teaching them. Thanks for all the useful videos!

[@ZavierBanerjea]

As always a big fan of Luis! He is a master of "Explain this concept to a kid" Idea. Of course, that is what Greatness is!

[@amandaahringer7466]

Excellent explanation, great job! Thank you for sharing!

[@in-my-opinion6423]

Awesome. Nowhere would one see such a clear explanation

[@mohamedarshad-l7u]

Nicely explained and easy to grasp !!!

[@title601a]

Awesome!!! Nice presentation, simple and easy to understand. Thank you so much :)

[@alirezariazi5325]

complex information explained very simple, TNX!

[@nurkleblurker2482]

Great video. But how do you determine a users preferences for movies in the first place?

[@rigoluna1491]

By far the easiest thing to follow, thanks

[@gholamrezadar]

Amazing explanations. Thank you for this video.

[@TitasSaha-er5ye]

You are the best !! I am so amazed that i understood the video in just one go, Thank you :D

[@ASHISHDHIMAN1610]

Hey sorry for knit-picking but at 17:01, the red triangle would have transposed shape i.e. greater height(2000 users) than width (1000 movies) !! Great video though !! Please make one on Gaussian Mixture models.

[@Betterdailyy]

Thank you so much for this! It really helped me!

[@youngzproduction7498]

I must say thanks for your effort. This vid literally saves my day.

[@josephhsueh6456]

appreciate your efforts to make such a good video! thank you! everything is detailed! love it

[@rosabasagoitiastigarraga8673]

Very nice example and a very good explanation. I was trying to reproduce it using recommenderlab but still some details to fix!.

[@Lae56]

Awesome! Truly appreciate. Very informative and easy to follow.

[@Chevignay]

Awesome video, really well explained thank you!

[@naffiahanger9316]

Best explanation of matrix factorization.

[@scherwinn]

Excellent way to show Gradient Descent and error function.

[@bradhammond5581]

Great video, you broke down ML into easy-to-understand terms. Great job!

[@dydx3741]

wow....thank you so much for this explanation !

[@ishand8209]

Amazing explanation. Totally worth watching.

[@jjj78ean]

Amazing explanation! Thank you Luis

[@terryliu3635]

Great explanation! Thank you!

[@samarthpianoposts8903]

Since the video is over 30 min long, let me break it up 00:40 How do recommendations work (Netflix example) 07:35 How to figure out dependencies (Matrix Factorization) 16:03 Matrix Factorization Benefits 20:38 How to find the right factorization 26:35 Error Function for factorization 30:14 How to use the factors to predict ratings (Inference) Really informative and comprehensible. I was wondering what is the difference between collaborative filtering and the Deep Learning recommendation algorithms. Now I understand that DL is one of the ways to perform the factorization for the collaborative filtering method.

[@SerranoAcademy]

Thank you, that's very helpful! Added the timings to the video.

[@iamdanielkip]

I was driven here after reading a chapter on RGA's book where the mention "collaborative filtering". I was curious and decided to learn more about it. I would like to know though, what computer language is generally used to achieve this? Thank you for the very simple and fun explanation.

[@justthej]

Thank you so much for this. Very easy to follow.

[@alifia276]

Thank you for the wonderful explanation:)

[@ttmhui]

Thanks a lot for such a user-friendly video!!! Bravo!

[@UmairMateenKhan]

You are a great teacher. Thanks

[@sheruloves9190]

Very informative and useful. You made it so simple! Thanks.

[@Azureandfabricmastery]

Thanks. Nicely explained with visuals to understand matrix factorization.