Bethesda will soon be acquired by Microsoft and this information will likely change at that time.

From Bethesda's Fan Video Policy:

"We are okay with (and encourage) these fan videos being posted on video services like YouTube or on your personal website and/or blog. It is also okay for you to offer your videos via the YouTube partner program, or to initiate a crowdfunding campaign or accept donations to cover solely the out-of-pocket costs of your video project."

"There are particular cases where we may pull down videos or request videos to be removed. Such cases include, but are not limited to:"

"Commercializing the video content; this includes, for example, selling the video content via online access or in physical form, or selling digital or physical goods exploiting the video content or IP assets from our games"

See more details by clicking the "source" link below.