[GBC] Issues playing the homebrew video player GBVideoPlayer2

[RafaelTrepaUnCarballo]

GBVideoPlayer2 is a new prototype homebrew of video player. This new version renders at a higher resolution and with PCM audio.

On mGBA, the image has a thick vertical strip of garbage on the left side that moves the rest of the frame toward the right.
Also, the whole frame look corrupted, with vertical artifacts, compared to BGB and real HW.

Some examples:

Mezase demo (Pokemon japanese opening): mGBA vs BGB vs Real HW


Real HW video

Digimon Opening: mGBA vs BGB

Interframe blending improves the presentation a little (as surely the homebrew relies on LCD ghosting for the presentation), but even with it the visuals look worse than BGB and HW

Specs:
mGBA dev: 0.11-8499-eaee4228b
Windows 10 x64

This bug isn't related to #1113 , which remains solved.