For years I have had a great university video
server. Soon, my school is going to get rid of it. (Yeah, how's that for progress!) Anyway, I am in the same boat as you right now, looking for a good low-cost video server. I still have a few more months, and I do have one solution that might cost around $30/month. I am exploring for a better lower-cost solution. My school is using Kaltura, but Kaltura doesn't provide me a fully-qualified
URL, something that I really want. My school also has Panopto, and I am exploring what that product might do. I am exploring Vimeo myself, and maybe their $20/mo product will work. DigitalOcean seems to have an interesting offering, but they are speaking a different language right now, so I have some learning ahead of me. Youtube, maybe so, but I too worry about ads, and as far as I know, Youtube doesn't provide a fully qualified
URL.