I wish Unity's built-in videoplayer wasn't such a disappointment. The performance on Windows is god awful. Have had to write a mass video reference recompressor/in-scene replacer that just attempts to pick the best compression flags and reduces resolution just avoid dropping frames playing ~1080p videos on multi-core PC's with discrete GPU's. Mac was fine playing even the overly high res original footage, high 2000+ pixel portrait tutorial videos.

Wrote a proper double-buffering video/audio player in Unity using parts of an ffmpeg wrapper over ten years ago. Seems silly they never did anything similar officially, just used lackluster platform API's.