For all of our sanity, please don't start producing 8-bit H.264 videos with full 0-255 range.
If you have enough control over the decoder and renderer to make that hack work, you should just be producing 10-bit HEVC/AV1 video – which does not suffer from these 8-bit banding issues – with a modern color space (Rec 2020, PQ, etc.).
And if you don't have choice or control over the decoder and renderer, then it's a good sign that this would be a fragile hack.
If you have enough control over the decoder and renderer to make that hack work, you should just be producing 10-bit HEVC/AV1 video – which does not suffer from these 8-bit banding issues – with a modern color space (Rec 2020, PQ, etc.).
And if you don't have choice or control over the decoder and renderer, then it's a good sign that this would be a fragile hack.