Not long videos, maybe 1-2 minutes at most.
This is new, and so might change, but for now, there's no charge.
If you want to succeed and rise above your competition, you have to work hard.
Alternatively, you can be known by a stage name or a pseudonym.
Do you not have 3 minutes for a potential subscriber? This is another place where you can both establish greater connections and show appreciation for them as a subscriber.
Also, you can consider other social media platforms listed above that allows adult content like Twitter or Reddit.