I watched the first bit, but again, I don't see this UN world agreement relating to Daniel's prophecy. In context, Gabriel was revealing to Daniel the number of weeks and specifics of Israel's punishment for their sins and disobedience. So, this covenant is with Israel.
I was less wed to that doctrine than you are. I have been studying this for more than 40 years and have been most impressed with how many theories have been disproven.
For example, there is no verse that says the tribulation is seven years. The seventieth week is seven years and you can count the months of Antichrist and others and come up with seven years, but it is far more Biblical to say that the tribulation was the entire church age than just those seven years.
Another theory is that the White horse of the apocalypse refers to Antichrist. A very strong and compelling case can be made for the sixth seal being the pre tribulation rapture and that the seals were opened by the Lord, not by Antichrist, right after the Lord was crucified and not two thousand years later. This is what Paul says in Ephesians.
Another theory that just got popped was that the 144,000 are sealed after the sixth seal is opened. On the contrary there seems to be a direct relation between the Lord's word about everyone is oblivious to what is coming until Noah enters the ark and the flood comes and destroys them all with what Paul said about the restrainer stepping aside and then the man of lawlessness being revealed with the 144,000. There was a command to the angels given the power to harm earth and sea that they were restrained from doing so until the 144,000 are all sealed. That tells me they are sealed before the rapture, before the restrainer steps aside.
Now let's examine this theory about a peace treaty for seven years.
Daniel 9:27 He will confirm a covenant with many for one ‘seven.’ In the middle of the ‘seven’ he will put an end to sacrifice and offering. And at the temple he will set up an abomination that causes desolation, until the end that is decreed is poured out on him.”
If this covenant is a peace treaty with Israel allowing them to rebuild the temple and worship the Lord, then why wouldn't this say "in the middle of the 'seven' he will break the covenant"?