I have a large video that features some animations too complex/long for other methods of embedding (gif, png sequence, etc.) and we are running into an issue with the colors
For anyone interested: when faced with the same situation, a few hacks came into my mind like:
Create a super small video, using the background colors of the original one (They will always be displayed as the same color in any browser). Use it as a background and resize it to 100% for instance.