from https://bitcointv.com/login: "Logging into an account lets you publish content

Currently this instance doesn't allow for user registration, you may check the Terms for more details or find an instance that gives you the possibility to sign up for an account and upload your videos there. Find yours among multiple instances at:

https://joinpeertube.org/instances."

As I understand bitcointv.com and the underlaying software https://joinpeertube.org/ is that it's a federated system where you can create an account at the peertube instance you trust and then come back to https://bitcointv.com/login to login there with these credentials. see this site for possible instances: https://joinpeertube.org/instances