Comment by fc417fc802

No? If mainstream software handles the features (which mpv, vlc, and ffmpeg do) I wouldn't consider them to have fallen by the wayside.

I agreed that three were rare (two I've never personally encountered in the wild) but the rest I consider common. Actually if multiangle is referring to 3D video then I've encountered that one too. It's just that 3D videos are themselves quite rare but I think most software supports them.