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GD&T is all about making callouts that are practical for saving money and improving part rejection through communicating clear design intent. Runout has everything to do with the rotating shaft's operating properties rather than its geometric ones. Runout is a measure of wobble under rotation and its datums come entirely from the rotating axis of the fixturing holding the shaft, in this case in the video, these are the motor bearings. Circularity requires measuring all around the part to find the theoretical center of the cross-section and then figuring out the deviation from a theoretical circle about the theoretical center. These extra steps are needed because the swing of the bent shaft (and indeed the physical distance of the center of the cross-section from the rotational axis) contribute to the indicator runout measurement, but are not part of the circularity measurement. A lot of gd&t courses make runout sound complicated by talking about how it's the measure of a great many factors, but in reality, it is one of the simplest measurements you can make because you just stick an indicator on there and see if it wobbles.

There are a lot of latest softwares sir ; Blender;Fusion 360;solidworks also have animation pane inbuilt they can perform cad as well as animated videos could be created with them seamlessly

Frank i use a angle block and the height gage, clamp the part to the angle block using the little block he has to set it up in 1 side then just clamp and block.

How face out is measured ?

What does the meter measure exactly? New learner hence help would be really appreciated. 😬

But you aren't referencing it to itself as if it was "relative to A" and also defining "A", you are referencing the composite of both that axis and the other, which is completely measurable.

It's pretty much taken from ASME standard, page 102 in 2018 v. But yeah, I wonder how that's measured...