Auto playing video Adverts in wordpress

wonder if anyone can help me, i have seen this auto playing (volume muted) video adverts, in many mainstream sites, such as CNN, anyone knows a way to do that, so that when a visitor load a page, the advert will start playing , with volume muted.

thank you

Do you want the videos to play every time someone visits your page, and then audio to play only if the viewer clicks on the video or something?