How do I edit custom HTML padding for a video on my website?

Store Design
,
1

https://musicfestivalsupplies.com/

my website link is above, i have added custom HTML to my website to show a video however i dont want any gaps before or after this video and i have been trying for a few hours to edit the code and get rid of it, an example of this is iheartraves.com. they also have a different video for the mobile version and i would like to know how to do that aswell. any help at all would be greatly appreciated

2

@Cheddarrl
Put below css into your base.css file
online store → theme-> edit code → base.css

@media only screen and (max-width: 600px) {
#PageContainer {
  width: 109% !important;
}
}

Hope it will be helpful for you . You can checkout my screenshot : https://nimb.ws/bcPRLK

If you have any query regarding of it then feel free to ask.

Thanks !!!