Sorry for facing this issue, it’s my pleasure to help us.
Welcome to the Shopify community!
and Thanks for your Good question. 
Please share your site URL,
So I will check and provide a solution here.
http://le-singe-shop.myshopify.com
code: weatso
Thanks for details
sorry but your video already black part of this sower not control cover your video full screen on generate
Hi Kumar,
I managed to fix the video problem, I had to cut the videos like you said. But now I have a different problem, the layout on my page is different on phone mode. See the images below:
Hi again Kumar,
On the page it looks good, but on the mobile version it looks like the picture I sent you, how can I make it look proper on the mobile phone?
Yes, this looks different than the computer version. How can I make it the same as on the computer?
I mean the layout of course, look at the text over the green picture, it is too close. On the computer version there is a space between the text and the picture.
It can be done by doing some code customization. please send me a personal message and we can discuss what you’d like