The thing you MUST remember, is that in the beginning, the first version of Bleem was going to allow you to boot 100 PS1 games per disc. Bleem deemed it too much work to code 4 emulator discs for 100 games each, and they decided on doing it on a "Game by game basis", so, in the end, we got 3 VERY optimized boot disc's.
So, with 100% certainty, I can say that the old beta has better compatibility in game, but FMV's, saves, and analog support are nonexistent.
I can say this much though, after burning the same games Alex tested in his video, and testing them for myself, the analog stick works with any game that supports the Dual-Shock controller and will boot with the Gran Turismo 2 boot disc.
I don't know if Alex will make any more of his tests public, I would have to ask him, but he showed us what is possible.
I would love to know what else he has gotten to work.
I imagine it must have taken him at LEAST 1 week to test all his games to find even the games he showed working in the video.