SUMMARY Koko should inhibit the screensaver while playing long videos. STEPS TO REPRODUCE 1. Play a video longer than the screen locker timeout without touching the mouse or keyboard OBSERVED RESULT Screen does not lock EXPECTED RESULT Screen locks while the video is playing SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux KDE Plasma Version: 5.27.5 KDE Frameworks Version: 5.106.0 Qt Version: 5.15.9 ADDITIONAL INFORMATION This is a solved problem in one of my applications (mpc-qt), and I am willing to license all of the files from https://github.com/mpc-qt/mpc-qt/tree/master/platform (files beginning with 'screensaver' in particular) under the license terms used by koko or the larger kde ecosystem. And/or you may take an educational look at how I solved this issue, I don't care which.