After Effects tutorial how to make loading circle animation. Using Shape layer with Repeater. This tutorial also uses the technique of adding letters and numbers to "source text". Subscribe!

To complete the build, [technocrat] attached his physical loading animation to a black t-shirt emblazoned with the YouTube logo to make everything more understandable.

The animation only seems to show up when a video is loading, not when it's buffering in the middle, so that's where you should be looking for it if you haven't seen it before. I suggest you switch ...