Considering Bethesda make use of privately made mods to advertise the versatility of the game and creation kit in order to boost sales, they would be laughed out of court if they tried to ban it the other way. I think Bethesda are far too sensible, far too busy, far too customer oriented to begrudge you a mod maker showcasing your mods on Youtube and gaining advertising revenue for having gone to the trouble to do so.
Besides if I make a video of a walk across some hills and those hills happen to be in private ownership? There is a saying at least in the UK. lex de minimis non curat. (The law doesnt care about insignificant matters).
I would say that if the video contains significant footage of your mod then you're fine. If its ten minutes of game footage with a mod made statue of a mouse in for ten seconds in a small corner, then its not about the mod is it.