Posting here for visibility.
Not quite a lawyer pede, but close.
I would suggest your first task to be suing Biden, and the Biden Administration, for not allowing comments on the official White House YouTube Channel.
There already is precedent under Knight Institute v. Trump.
Comments are turned off on every video: https://www.youtube.com/c/WhiteHouse/videos
Here is the case: https://scholar.google.com/scholar_case?case=9996943476269818670&q=knight+first+amendment+institute+v.+trump&hl=en&as_sdt=4006&as_vis=1
Information on the case https://www.npr.org/2019/07/09/739906562/u-s-appeals-court-rules-trump-violated-first-amendment-by-blocking-twitter-follo
The key take away, "a three-judge panel of the 2nd U.S. Circuit Court of Appeals unanimously upheld a lower court's decision that found that Trump violated the First Amendment when he blocked certain Twitter users, because he uses his Twitter account "to conduct official business and to interact with the public." By preventing critics from accessing his feed, the president is barring them from participating in what the judges deemed a public forum."
If the court system has ruled that a President/Government Official cannot block or violate critics from accessing their feed, or a public forum, by that logic wouldn't turning off YouTube comments be doing the same?
I think we are making different arguments, my friend.
I am arguing that if blocking certain critics was found illegal, because it is a public forum. That should mean that YouTube comments qualify as a public forum.
If YouTube is a public forum, turning comments off would be the equivalent of silencing all political debate at a public park, sidewalk, etc. Which would violate the first amendment.