It seems like an odd choice, but we can’t fault Valve for it as they probably want to expand on what they sell. However it seems that Valve has decided that they will no longer sell video content that is not related to gaming. This is according to an announcement on its website where they revealed their plans to end the sale of video content.
According to Valve, “As part of this refocus, we have retired the Video section of the Steam Store menu with an expectation that video content is discovered via the associated game or software store page, or through search, user tags, recommendations, etc. Over the coming weeks a number of non-gaming videos will be retired and will no longer be available for purchase. Previously purchased content will remain available to owners.”
That being said, Valve is not 100% done with videos just yet, but rather they will be keeping it to gaming-related content, which means that Steam will no longer be a one-stop shop for all your video needs.