as i searched most of ad providers use html5 for playable ads.

im using unity webgl to make those playable ad. but facebook playable ad size limit is about 2mb and i think google-ad is the same. but unity webgl empty output is about 3.1mb that is high for these condition.

im looking to make the simulation in unity and make a small size video from it and make final result in specialized tool for it to make best result. is there any best specialized tool that give me best and smallest size for making plyable ad?

i tried to use unnity project tiny but its under heavy development nad not so good to use at this time.