Hey bud! apologies for the late resp, Hive wasn't retrieving replies for me....

Yeah, so on d.tube click on your avatar and "add new account" pick Hive and sign into d.tube so you are signed in with both, (Steem too, if u want all 3 accounts).

Then, if you click on the gear at the top right, make sure your API is set to Hive.blog or whatever it is... and same with the other 2 accounts to their respective proper API (should be the 1rst opt always).

You should now be able to post to all 3 chains :)

How's it going? Hope you're holding up ok!