Are you referring to embedding a YouTube video on your Weebly site? If so, you can't modify how ads pop up or even if the player transitions to a new video. That's what makes our video element so valuable, because you host the video yourself. It's only available via the Pro and Business plans.
Maybe you could try Joyoshare VidiKit. You can use the built-in video cutter to cut and trim unwanted parts of your videos, or you can use the built-in screen recorder to resave your videos without ads. I hope that my reply can be helpful.
