It remembers my position when I watch a video part way through, they have an app for just about every device you can get, they have a subscription service that removes all ads, it supports everything from 144p to 4k, it has livestreaming with multi-camera support, it supports 360 videos, has annotations, subtitles, speed changing, and more.

Compared to the next best thing, YouTube is still winning by a lot for me as a user.