How to adjust the YouTube video embed size in post edition?

• t4ng

• May 12, 2025 at 10:07 am

Hi!

I’m trying to adjust the size of a YouTube embed field, which by default, displays the selected video way too big, on the admin panel. Indeed, since it’s an admin panel, I feel most content administrator don’t need such a big preview, especially since YouTube offers the possibility to display the video in full screen mode from the preview.

I can think of 3 different methods to solve this – 2 obvious, and the latter much less user friendly:

1. The General > Embed size: With / Height parameters – These are useless, they just have no impact on what’ going on in my admin panel. ChatGPT says it’s related to Gutenberg, for what it’s worth… But if it’s true, it’s a shame considering how long Gutenberg has been around.
2. Presentation > Percentage: somehow works, but adjusts only the width, not the height. So that when attempting to reduce the width, I end up with the full height of the video, and not the hidden sides.
I expected this to respond to an aspect-ratio rule.
On top of that, these percentages have no native stacking rules, so that’s it’s just un-usable on a smaller screens.

3. CSS, which seems overcomplicated for such a simple thing, especially for non-developers

Any thought or solutions?

Thanks!