Out of the 10 screen-recorders in Dave's link above, there's 2 I use frequently.....and one occasionally. The occasional is Maarten Baert's SimpleScreenRecorder; this works best on the old Dell Latitude.
The other two? Vokoscreen.....which I use in certain situations. The other is recordMyDesktop.....one of the oldest in that list, yet despite it only outputting an Ogg container with Theora for video plus Vorbis for audio, is still happily accepted by Google for YT. And it's ridiculously simple to use.
One other long-standing favourite of mine is a wonderfully "quirky" item, probably the oldest Linux screen-recorder still extant.....
XVidCap. I've uploaded an old instructional video made by the app's original developer, probably the best part of two decades ago.....found on the XVidCap site:-
XVidCap @ SourceForge
(Check out the quality of those GUIs.....you'll see what I mean about its age!)
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Many reckon it's not possible to record audio with XVidCap, despite it having that ability. You
can quite easily.......once you're aware of a small 'workaround'.
Unlike modern Linux, XVidCap was coded to use the older audio 'block' devices. But if your recording card is listed by the OS as
.....just for the sake of demonstration - then in XVidCap's settings you would enter it as
It's as simple as that.....and
now audio recording will work. Needless to say, via rebuilding it into an AppImage, I've 'portabilized' this for the Puppy community.....in which format it works really very well.
Mike.