i know the footage from hyde park that is available is not good at all.
but while watching brighton rock from that concert just minutes ago, i realized that they use small clips of footage from hyde park in the Bicycle Race and Somebody to Love videos, they use the clip from the beginning of Queen's performance (the image with the stage) and the part from Brighton Rock when Brian starts running around and ends up at Rogers drumset.
i may be a dumbass, but i just realized that