Attempting to edit video details while on Firefox always returns a 400 response code

<img width="1807" height="905" alt="Image" src="https://github.com/user-attachments/assets/87fd8b3d-7339-446c-ae66-d30dc31e93d6" />
Tested this on a private browser with no other extensions and my user ID set. I've experienced this issue for quite a while and just now decided to report it. (i hope im not doing something wrong thatd be awkward)