u/Gullible-Program-761

I’m trying to figure out how to get my old splatoon account to my Nintendo switch 2 but I have a problem you see my switch 1 account is different to my switch 2 account and I have already made so much progress in both accounts and i don’t want to do it again. Can someone help?

Whenever I go on to Pinterest video downloader and put my link in instead of letting me download my video it tries to make me download an image of a collage with the Pinterest logo in the middle for every video I want to download can someone please help?