Try it. Also there is Cloudflare doing a video CDN. I don't think they have a free plan with that, but it would be interesting to see what the costs actually are. There should not be a need for a CDN though if you are only showing a few videos to a few people. Video does the buffering thing so it should be possible to serve video half way across the world.

I would give it a go myself but I only have audio!