Hello everyone!
As you know, the streaming players are embed on other sites, so there is no way to find the pops (to get the IDs).
1) Do you know which ad networks have good mediafire.com traffic?
2) Are there any tools/strategies to find out?
Thanks 
Found the following info...
https://www.similarweb.com/website/m...e.com/#display

https://builtwith.com/mediafire.com:

(I didn't capture the entire "Advertising" section - lots more results you can go through.)
Hope that helps!
Amy
Thank you @vortex!