i don't think the video mentioned more than one controller works but i did it personally for a good long while before posting this thread.
hopefully nintendo starts selling the adapters and controllers again i'd hate for everybody to have to buy those awful third party controllers.
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it was a bit hard to do.
i had to have both the black and the gray wire plugged into the front of the switch dock after i couldn't get it working in the normal press L+R screen i went to find my controllers it it detected them there, they worked the first time from there on out.
Hey that worked, thanks.
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Someone needs to make a master list of switch games that work well with a GC controller.