Codec using 10 bits YUV are becoming increasingly more common (YUV420P10, YUV422P10 or YUV444P10) In particular because bluray 4K videos are using it. VP9 profile2, h264 (and soon hevc) all support it and we're starting to see videos in the wild. We should be able to render images coming from the media decoders using 10 bits YUV (and also 12 bits if possible)