Quoting: EikeSo... What's the preferred way to pack (high quality) video in Unity?

The table on the Unity manual page you linked to suggests that only .ogv, .vp8 and .webm videos are supported on all three platforms, including Linux. Of these three container formats, your best bet for quality is probably opus audio and vp9 video in a webm container. Let me know if you need help with encoding, but everything you need should be available in your distro repositories.

Quoting: tuubiThe table on the Unity manual page you linked to suggests that only .ogv, .vp8 and .webm videos are supported on all three platforms, including Linux. Of these three container formats, your best bet for quality is probably opus audio and vp9 video in a webm container. Let me know if you need help with encoding, but everything you need should be available in your distro repositories.

VP8, not VP9, right?
Thanks for the tips!

No, I meant the VP9 video codec, not the older VP8.

I'm asking because Unity explicitly has VP8 in its compatibility list (and unfortunately doesn't mention VP9 at all).

Quoting: EikeI'm asking because Unity explicitly has VP8 in its compatibility list (and unfortunately doesn't mention VP9 at all).

Are you talking about the formats Unity can transcode a video clip into? If you are, you should be able to encode the video externally, and disable transcoding in Unity. As far as I can see, Unity can only encode vp8 or h264 video, while they list containers in their platform compatibility table that can't hold either of those formats.

In any case, VP9 offers better image quality if Unity can play it back on all target platforms, but VP8 is not awful either.

(I assumed my original answer was correct based on the fact that @mdiluz "liked" it, and he works for Unity these days.)