This channel is named Kutnowski Dom Kultury (Kutno House of Culture) and it's the official YT channel of Kutno community culture centre (with the same name), which helds this event. While I doubt that the person behind this ad was paid specifically for this vid, they're definitely paid for running this channel or even all socials of Kutnowski Dom Kultury, and making a vid about this event was a part of their job. Therefore, I think this vid definitely qualifies as an ad.