Loading Youtube doesn't work in an iframe

[ManagerCat]

Describe the bug
When in iframe, it won't allow youtube to load any resources with error "Uncaught DOMException: Blocked a frame with origin "https://localhost:8443" from accessing a cross-origin frame."

To Reproduce
Steps to reproduce the behavior:

1. Place the Public Deployment Example in an iframe
2. Open Youtube

Expected behavior
Youtube should load

Screenshots

Desktop (please complete the following information):

• OS: MacOS Big Sur
• Browser: Brave

[HALFMETALKAIBA]

you are using http on https requests, either make it http requests or make your server https

[Gigityx0ff]

I'm also getting the same issue, I try embedding the proxied website into an iframe and I get errors stating that it has been blocked.