A typical video on such a channel follows a rigid format:
There is a legitimate argument for preservation here. With the Wii Shop Channel defunct, thousands of digital-only titles were effectively stranded. If you didn't buy Super Mario Bros. 3 on your Wii in 2008, you cannot buy it there today. The "Wii Wad" channel acts as a librarian for a library that burned down.
: Obtain the WiiMC-SS (SuperSelection) files, which include the modern YouTube API fixes.
: Follow the YouTube channels mentioned above for historical content. Download WADs only from archive.org or well-known creators' backups. And remember—always make a NAND backup before installing any WAD.