You don't have to be a company in order to advertise something. Charities, unions, lobbyists, and governments all put out ads for various purposes. (Note that I'm not saying anything about the content of this particular video, or the value of proportional representation, just that an advertisement doesn't necessarily have to be pushing you to exchange money for specific goods or services so that the advertiser can profit.) You're still welcome to claim that the video isn't an advertisement, but you'll need a better reason.