Video Modul does not scroll

Hi community,
I am new with BB and I am German … So my English might not be the very best. I am working on a website for our summer toboggan run. We produced a nice 10 sec video clip which I love to embed as a hero video at the top of the website right below the top bar menu.
So I took a row with 1 column and placed the modul “video” in there. I uploaded the video…What works well.
I placed some other content below the 1 row content box. But if you have a look at the website the content belows is scrolling up behind the video hero.
Can anybody help?

Hello Community,
anybody who can help me out here?