Question: What is the significance of the guy moving the button on the control panel at the Live Aid concert? He moved the "no" tape and slides the buttons and then puts the tape back.
Question: What is the significance of the bar scene they keep cutting to during the live aid performance? It does not appear to be the same door that Freddie first played with Smile so I'm not sure the significance. Also, who is the blonde guy with glasses sitting next to Bob Geldof when Bob is asking for money? That's supposed to be someone famous?
Answer: It's not any specific bar, it's just a very common trope in this kind of movie to show everyday people in a bar/pub watching/responding to a massive televised event (cf. V for Vendetta). The guy sitting next to Bob Geldof is David Hepworth, who's not super famous; he's a British music journalist and was a co-presenter of Live Aid.
Answer: There is no major significance other than he felt Queen deserved more volume. Queen was one of the biggest bands in the world at that time.