Ok, I (BatteMan and not BattleMan by the way) am not developer.
I just try to give some infos to avoid an useless fighting.

All I can say, it's that he traces VBO/shaders problems to make them working with OS4 shaders, that's it, and I can't say or understand more.
Is it normal to seek same problems ? Seems legit to me, even if I don't understand how we can track shaders bug...

Why did he remove his videos ? I don't know...

Will he answer ? I don't know, again, but did you try to contact him directly ? It's always better to talk privatly before putting all publicly, no ?

I'll send him a message if he wants to put some words here or to exchange with you directly. It's the only thing I can do.