@pspzockerscene
I had the same problem as Wow843, but i remember when i logged into youtube on jdownlaoder it works. But now i cant login anymore. my log is:
12.12.18 19.06.58 <--> 12.12.18 19.10.13 jdlog://2120764433151/
I resetted my JDownloader, logged in on youtube in my browser, it works fine.
But when I try to add my account, it says Cannot Add account because Premium Account.