Thanks Merlijn for a tip, I try OBS.
Philippe, the fair answer would be "the first app my Linux distro found for me"
The name is "vokoscreen" and it's very basic but works well. Then, I made all video cuts and titles in openshot (version 1), using also Inkscape for nicer titles.
Philippe, the fair answer would be "the first app my Linux distro found for me"
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