Thanks for the report Tony. Can you confirm that it's only switching in and out of fullscreen mode that's laggy, playback is otherwise smooth?
Could you please run the following command in a terminal to attach additional information to the bug report: apport-collect 1871618 ** Changed in: chromium-browser (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to chromium-browser in Ubuntu. https://bugs.launchpad.net/bugs/1871618 Title: Switching playing youtube video to full-screen mode and to default mode lag on Chromium Status in chromium-browser package in Ubuntu: Incomplete Bug description: The switching of a playing youtube video to fullscreen mode and also from fullscreen mode to normal mode lags. Ubuntu version: 19:10 Chromium version: 80.0.3987.163 (Official Build) snap (64-bit) Steps to reproduce 1. Launch Chromium and open Youtube. 2. Select/search for a video and play. 3. Switch the playing video to full-screen mode and back to normal view. When playing a video using chromium the switch to full-screen mode and back is expected to be smooth but instead, the switching is laggy. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1871618/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp