Video streaming in general is one of their red lines, you're not supposed to shove any kind of video through their CDN unless the origin is another Cloudflare product (e.g. CF Stream or R2).
https://old.reddit.com/r/PleX/comments/152wfdh/can_i_use_a_c...
Cloudflare threatened to terminate our $15k enterprise license last week for serving 76 TB of API JSON files last month (90% cache hits).
I moved half of the traffic to a new domain with a Business license to see what they say...