How to change the size of a pop up video

Topic summary

A user needed to increase the size of a popup video on their Shopify store page.

Initial Solutions Attempted:

  • One responder suggested adding custom CSS targeting YouTube iframe elements with a fixed height of 500px, but this approach did not work.

Successful Resolution:

  • After the user shared their store URL and specific page location, another responder identified the issue and provided a CSS solution.
  • The fix involved editing the theme.css file and adding code to set .pswp__container .pswp__custom-inner to max-width: 100%.
  • This solution successfully resolved the issue, allowing the popup video to display at the desired larger size.

Status: Resolved. The user confirmed the solution worked and thanked the community.

Summarized with AI on October 27. AI used: claude-sonnet-4-5-20250929.

The pop up video on one of my pages is small and wanted to increase the height and width of the video.

Hi @sjackson_1

can you share your store url & password (if applicable ) to let me check & suggest you the solution

Hello there @sjackson_1 You can try out the following steps

Shopify admin > Online store > Customize: https://prnt.sc/XQ6IDB99kUCd
Step 2: From the left menu > Theme settings > Open Custom CSS: https://prnt.sc/iDxwa8zBQ4Z-
Step 3: Copy the code below and paste it there

Here is the code for Step 3:

iframe[title="YouTube video player"] {
    height: 500px !important;
}

Let me know if this works for you!

https://eibcnr-px.myshopify.com/

pw: test

does not work

where can I see your popup video?

https://eibcnr-px.myshopify.com/pages/our-way

pw: test

let go to Admin → Sale Channels → Themes → click edit code your current theme → find file theme.css then paste the code below to the end of that file:

.pswp__container .pswp__custom-inner {
  max-width: 100%;
}

Save it then see the result:

Amazing! Thank you so much!!

You’re welcome :hugs: