This very site has a place you can upload videos to, suggest you poke around and check it out.
I've uploaded grow videos to utube, but i'm a certified mecical maryjane patient, (amongst other things),
so I have no worries.
Your mileage may vary, however lots of people have grow vids on utube and i doubt all of them are legit
medical maryjane users.
Just use common sense, don't use your real name or location.
Be cool and stay safe.
if you are in a state that has Medical Cannabis laws I don't think you have anything to worry about. Like Acid said if your cool about it and are not stupid you wont have any issues.