Were there? They found two right-wingers to say they were in the room and that it was live. In this regime, that doesn’t rise to the level of ‘credible.’
He’s getting all kinds of credit for being able to speak at twice his usual rate for 18 minutes. They’re not going to want to give that up those positive reviews of his fitness/stamina.
The sources are the White House correspondent for the Independent and a Politico writer. I see no reason to believe they’re involved in a conspiracy to trick the world into thinking a pre-recorded speech was broadcast live, when Trump appears on live TV multiple times a week. He does enough real stuff that’s terrible - we don’t need to imagine conspiracies where there’s no there there.
Do you care to back that up with, oh, I don’t know - an actual cite? From what I can find neither of these reporters are “right-wingers”. I can’t find anything to put Laura Rozen definitively in either column. But Andrew Feinberg is well known for his clashes with Kellyanne Conway in the first Trump term. His reporting was also cited by Democrats during the 2nd impeachment trial of DJT. Again, cites or those claims aren’t accurate.
This was a live speech or the media would be screaming about it.