Singer 20U Industrial Sewing Machine Tutorial

How to use the Singer 20U industrial sewing machine - its use and maintenance - half hour video. Information includes basic sewing, bobbin winding, mechanical changes for a zigzag stitch, buttonholes, oiling the machine and care. Tutorial is by Alice Berry aliceberry.com/ MORE information below!
SIZE NEEDLE - ONLY use Singer Industrial needles, they have a groove in the front. NOT "universal" or tabletop sewing machine needles.
MODEL - Singer 20U from the 1950s or so. I have no information more specific than that.
8/29/2015 HEY HATERS, this is a free tutorial video for an internal arts and technology makerspace, so like it or do not watch it. I'm not here to teach you for free, hold a class for free or answer your questions for free. This is not "Yahoo! Answers." What's in the video is here for your benefit as provided by a fashion expert who used the machine for decades and is intended as a complement to an in person class, the benefits of which video you are getting for free. Additionally, a specific person has been reported repeatedly for trolling this comment thread, bashing and making comments about Ms. Berry which are abusive; all of which have been reported to KZbin.