More than likely they're swimming in the same pool of sterons that pro BBers are using, just in much smaller amounts.
The point is that they're not so clearly roided out that they're no longer believably natty (you're in here on some
yourself), but not too little to give them an edge over normal brehs that don't have YT channels. This is what it looks like when you take drugs in moderation.
Also keep in mind that things like:
- Aggressive behavior
- Shrinking testicles
- Erectile dysfunction
- Enlarged prostate
- Growth of facial hair
- Decrease in natural testosterone production
- Heart problems, including heart attack
- Liver disease, including cancer
...wouldn't be visible from watching videos on YT, and may or may not show up later in life.