Plenty of people had reason to celebrate Mr. Roche’s downfall. First in line were Dr. Wright, the man who claims to be Satoshi Nakamoto, and Calvin Ayre, a gambling tycoon who bankrolls Dr. Wright. Dr. Wright quickly sought to exploit the videos, filing an unsuccessful motion to disqualify Roche Freedman from the Kleiman case. And after the videos came out, Mr. Ager-Hanssen became chief executive of nChain, a company that Mr. Ayre funds and that employs Dr. Wright as chief science officer.