Came across a 5 minute live video of the Stones 7/20/72 show at the Phila Spectrum, mind you this was 53 years ago but i’m pretty sure it was from that show i attended, as i recognized what MJ, MT and Keith were wearing from cover art from old boots and my recollection,

my question is why is this being posted now on YouTube as i have searched the internet, YouTube included for live video from this show for the last 20 years, fyi i did come across a live encore w Stevie Wonder of this show but why is this being posted on YouTube and what video technology enabled it to be captured so clearly