I'm not so sure about that. I just worked on a website that contained some video (for a children's show TV format), and we did some calculations on what hosting

I'm not so sure about that. I just worked on a website that contained some video (for a children's show TV format), and we did some calculations on what hosting the video would cost. With 50 Mb/video, you can do 20 video's for 1 Gb of traffic. Which, at AWS cost 12 cents. Let's say you'd pay half that at a cheaper CDN, 6 cents. You would, just for transporting the video, need to make 6/20=0.3 cents/page. That's $3 CPM, which seems high. And this is only for transporting the video, not the other infrastructure needed. Not so sure that's a winning business-model. To be fair, we also looked into setting up our own servers, some places have a few TB traffic with a $50 VPS, but than you need a lot more sysadmin work.