awesomechapro, hi! You can come across those sponsored videos in several spots: in the Shop (tab Flash Deals), in Hangar after finishing the battle - there is a pop-up after you click the “To Hangar” button after completing the match, and in Battle / Victory Crates - there are special Ads bubble notifications if the ads are available for viewing.

What the heck?

adds exist in the game?

im glad its not obvious.

Don't celebrate too quick. The ads just haven't been added in game yet. It's a leak of what is to come.

It's obvious if your account is included in the test.