The third and fourth point are what Trump wants. He doesn't care about losing the case. As long as he gets elected President in 2024, he can pardon himself, take over the DOJ, and have all his political enemies arrested. If a judge says that his self pardon is unconstitutional, they get added to the political enemies list, arrested, and replaced with a new judge that says it's perfectly fine.
Trump wants to have clips that he can play to rile up his base. Suppose a judge says "The defendant, Mr. Trump, has said that there's a conspiracy against him and that I'm in this conspiracy." Trump would release a video of the judge saying "... There's a conspiracy against... Mr. Trump... I'm in this conspiracy..."
Trump's base would then either elect him President or, if he loses, commit acts of violence in Trump's name in the hopes that this will get him appointed President.
Presidents can't pardon themselves of state crimes. He is being prosecuted for a crime in the state of Georgia. Being president would not get him out of that.
First, it is currently illegal to do so, and only the Supreme Court could overrule that.
It isn't illegal per se, but rather barred by the Federal Rule of Criminal Procedure. Also, it doesn't necessarily require the approval of the Supreme Court unless the approval or denial of cameras was appealed up to the Supreme Court level based on one side disagreeing with the ruling of the lower courts D.C. Circuit Court of Appeals.
For example, what is currently happening is that Judge Chutkan asked both parties to submit a brief on why cameras should or should not be allowed bases on the litigation introduced by corporate media stakeholders requesting the trial be televised. She can then take their opinions into consideration before making a formal request to the Magistrate Judge to allow cameras.
I think it is incredibly unlikely that this happens, but I could be wrong. I generally agree with everything else you said about cameras inviting all kinds of other issues into the proceeding. I have seriously mixed feelings about the entire thing.
This is why. For all his bluster about fake news, Trump actually has a generally good working relationship with journalists off camera. He knows many of them by name, he gives them their soundbites, and they give him free publicity for whatever he feels like talking about.
He wants to be tried in the court of public opinion, and that's a "court case" he can win (and fundraise from) easily.
Judge Ito made a mistake televising the OJ trial. If Trump's trial is televised, he'll turn it into a circus for fundraising and riot incitment purposes.
No, cameras have never been allowed in Federal Court. This would be a rare exception if it were to be allowed.
Major news networks like NBC have argued that it should be televised on the grounds that the voters themselves are the injured party due to the attempt at large-scale disenfranchisement and therefore voters have a legal right to be able to see the proceedings.
There is also the argument that it should be televised simply because of the importance to the general public interest.