In general you would need to whitelist www.drfrost.org and dfm.live for the functions on our website to work correctly. Additionally, we host our videos on YouTube and a list of all of our video URLs can be found here.
Please be aware that our site also makes use of some fonts and JavaScripts from various CDNs so, ideally, you would also ensure the following are allowed:
https://www.desmos.com/
https://polyfill.io/
https://www.googletagmanager.
https://fonts.googleapis.com/
https://fonts.gstatic.com/
Without these you will find that some functionality of the site will not work.