Would you recommend this over Dtube?

Yes.

Can you log in using hive keys also?

Here's what Dan Hensley (co-founder of 3Speak) said:

For 3speak you create a account with email/password like web2, then you attach your key in a trustless way one time, after that you only ever need to login with your email/password. We built this because hivesigner was having issues and we are working to connect keychain