I’m using Vimeo as the backend for my video course on how cars work. It’s working out great. They do all the storage, transcoding, subtitle hosting and provide a player. I had to code up a course player to wrap it all up with a playlist but everything else was basically solved from day 1. I even use their ‘Review’ tools to annotate the videos that my editor uploads.
It’s a great example of a business in a strong and profitable niche in an industry that is absolutely dominated by YouTube. I’m happy to give them my money.