如何通过javascript链接网站中的两个视频同时播放？

So I am helping my gf with her Uni project. She is a graphic designer and she needed some help with creating a webpage with a video comics. I made it so that the videos would play on hover with Javascript (this is the first time ever I had to use JS) and now I need a way to bind some of them together - e.g. you hover on one or the other and both play, you remove the mouse and both stop. And I need to do it several times. The website will contain a total of 24 Videos.So I am helping my gf with her Uni project. She