What to do with 800 YT-accounts?

I just received 799 YT-accounts as a payment for a small service.

They are Yahoo Based NON PVA Accounts on YT.

I have no idea how to monetize from YT and I have no real interests to learn but it just feels wrong having them lying around for no good.

Hence, it would be great if someone could give me a 101 or something on how to use these accounts efficiently

Thanks,