You can report whatever you want to report, but Mozilla will reply back explaining what I already have explained: no extension hosted on the AMO store can affect anything on the browser after it has been disabled and the browser restarted.

I did not say having the extension installed took care of the bug, I said that it was making it work because whatever problem YouTube has was being circumvented as a result of the features the extension implements in their own source code. It was a fortunate coincidence for those that want to keep using the extension.

You saw my replies to other users, but you also ignored that they confirmed the issue went away despite the fact that nothing had been changed in the extension.

Futhermore, it was reported and confirmed as a YouTube bug in the repository itself:

https://github.com/ParticleCore/Iridium/issues/771

It's your choice to report this for whatever reason you want, but like I said, what you have is a YouTube bug and there's nothing this extension can do to cause that after it has been disabled. Follow the suggestions others posted on that Reddit post and I'm sure the issue will go away. If it doesn't then report to the YouTube team.

Also, there's a search feature in Reddit which - had you actually used it instead of coming back here with such a vendetta - you'd find others reporting the video not working exactly like you described:

https://www.reddit.com/r/youtube/comments/djlmht/bug_every_video_loads_like_this_just_a_blank/

and another

https://www.reddit.com/r/youtube/comments/diy8ro/bug_love_youtubes_new_minimalistic_design/

But what do I know, I just do this for more than 5 years, it's way more likely that I've suddendly decided to make a malware-tier extension that just breaks YouTube (what would be the point?) rather than this being an actual YouTube bug like usual.