For silksong, this refers to the public release date

Yoshimaniac is at https://youtube.com/@Yoshimaniac?si=cWK6T2v9uok_sWz5 and CGP Grey is at https://youtube.com/@CGPGrey?si=NH1l_qRtOSQddvMN

If it is on another channel they have to make or another platform it counts

For Collatz Conjecture, the date will be when it is verified/passed Peer Review

This market will continue for the rest of time until one of these events happens.