I started out debugging the extracted javascript. I was feeling pretty clever when I found the decoded YouTube URL until Rick Astley started singing that he was never going to give me up. Nice Rick Roll Curtis! I hope it got some of you out there as well.

Next, I went through the different streams in Cerbero profiler and saw the JS tag with hex in the first object.

I put that into a hex editor and then tested the key to complete the challenge.