Yeah, I recognised those steps (and the security guard) :) straight away. I've watched the long form of that Thrasher video with all the failed attempts too. Not that the DH bike version was a walk in the park, but the skater shows a masterclass in perseverance and guts.
Those stairs are fairly (in)famous in skateboarding (probably bmx too).
https://youtu.be/7ji3UpOBrXE