Currently experimental hardware acceleration is only available for Radeon Southern Islands GPUs. Drivers are very experimental not yet available by default, ask me if you want to participate for testing. No hardware acceleration for Intel GPUs yet.
The problem with glitches visible on your video is unrelated to acceleration, it is incorrect mode setting. You may use fail safe video mode option in boot loader menu. It will not affect graphics speed.
I have amassed a pretty huge collection of graphics cards if you need hardware tested, don’t recall if any of them are radeon hd 7000 series, there’s over 5 large boxes of cards to choose from.