We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Why do videos jitter in fullscreen on 4k resolution, but not when i downscale to 1080p?

  • 1 reply
  • 1 has this problem
  • 3 views
  • Last reply by Anirudh7

more options

My laptop has a 4k resolution screen and whenever I try to watch videos they stutter horribly making them unwatchable, tho when i downscale to 1080 they play perfectly fine, why is it that eventho 4k resolution is pretty widely available, problems like this happen? Even games that has the same problem that I never expected to fix them within the next year or so have fixed it.

My laptop has a 4k resolution screen and whenever I try to watch videos they stutter horribly making them unwatchable, tho when i downscale to 1080 they play perfectly fine, why is it that eventho 4k resolution is pretty widely available, problems like this happen? Even games that has the same problem that I never expected to fix them within the next year or so have fixed it.

All Replies (1)

more options

Well even if your screen supports 4K Resolution your graphics card and CPU aren't powerful enough to play 4K videos. If 1080p videos run fine this means nothing's wrong with Firefox. You will have to upgrade your computer to play 4K videos.