Media, the way brokerages and shooters use the word, means capture: stills, video, floor plans, drone frames. Listing content means the written and assembled marketing built on top of that capture, so the MLS description, the feature sheet, the email blast, the social posts, the reel edit. Social media management is the ongoing version, a calendar of posts for the agent's own brand whether or not a listing exists.
Loosely, plenty of vendors say "listing content" for the whole bundle including the shoot, which is why your two answers didn't match. Ask any vendor for a deliverables list and the label stops mattering.
On the license: someone writing copy or scheduling posts under a licensee's direction, who isn't negotiating or soliciting business on behalf of a party, generally isn't acting as a real estate licensee. Licensing triggers are set state by state, so confirm yours with the state real estate commission before you take money for it.
The advertising rules are the part that gets missed. In most states an ad for a listed property has to identify the brokerage, and the licensee whose name is on the post carries responsibility for what it says, including anything that reads as steering under fair housing law. That's why serious content vendors build a written approval step in rather than publishing on their own judgment.
Paid drone work is separate again and needs an FAA remote pilot certificate, which sits with the pilot rather than with the agent who hired them.