Does anyone know if it is still possible to withdraw CV2 from Yobit? I believe there was a problem with it some time ago
Unfortunately, buddy, you will have to forget about your coins there, most likely...

I will be happy to make a mistake, but my practice and my friends confirm my sad words.
Yoshit is a bunch of thieves and swindlers.
RUN AWAY FROM THERE ASAP! It's not a exchange - it's a nasty dump of carbage!
BOYCOTT TO THE YOSHIT!!! 
Yeah unfortunately there's a lot of truth to what you're saying. I've long suspected Yoshit is run by criminals. They are happy to freeze customers wallets at will and use their funds to make more profit and corner markets. Stay away.