This is probably not quite enough in many cases. You may need a search engine that indexes your videos, a comment section, a way to refer to sections of the vid

This is probably not quite enough in many cases. You may need a search engine that indexes your videos, a comment section, a way to refer to sections of the videos, something that provides several versions / qualities so the video can be viewed on any internet connection but still be available in high quality when this is possible, adaptive streaming, and many other things I'm not thinking of. All that in a user interface optimized for videos. You can probably implement a part of these features imperfectly in a regular CMS and with the video tag, but you may as well use readily-available software that do this job for you well. If you host, occasionally, one or two videos, that's probably the best thing to do, but if you are to create a channel, you are probably better of using dedicated software.