@Erlingns95 passing here to inform that we just released Cockpit 1.17.0 and it now records directly to an .mp4 file, so it’s always playable, even while the the recording is still going on.
To benefit from this you’ll need to use the Standalone version of Cockpit (the desktop one, that you download and install). The Web version has been renamed to Cockpit Lite, and can now only record videos - not process or replay them.
We invite you to give it a try and let us know how it goes 