I hadn't even thought about videos, because I rarely even try (that is I rarely don't try to help others) to ID requests from video(s), because I'm not good at finding ID's from videos.
However, I do have a couple of tricks:
I use a site call iSpot (https://www.ispot.tv/). This is mainly for models/actresses you see in TV commercials. Go to the site, click the search, type in your query (EXAMPLE: Burger King) and then choose the commerical you're looking for and check the credits to see if the model is listed. Sometimes, you get lucky.
You can also see if the commercial is on YouTube and then check the comment section to see if anyone posted a model name (or you can ask for the model name).