Video hosting scalability is not the problem it was if you use a technology like Webtorrent, allowing peer-to-peer distribution of your video files. See PeerTub

Video hosting scalability is not the problem it was if you use a technology like Webtorrent, allowing peer-to-peer distribution of your video files. See PeerTube for a relatively easy platform for your private video hosting. Even putting Webtorrent aside, a simple server with a gigabit connection allows you to handle a hundred simultaneous viewers at once with a reasonable bitrate, all day long. If you're constantly getting more than that, you can surely afford a CDN or a proper infrastructure. I do agree that the network effects of YouTube are very hard to compete with, however.