@Erwin0265 : the responses from @Biscuits and @Grimhilda corresponds exactly to those I would have made you. Tell me if you want further explanations.

@Biscuits : Thank you for your comment about the tester. I confess that when I received this response, I was a bit angry because this person has absolutely no attempt to understand how the program works. About programs you can use CamStudio which is free and makes a screen capture with the possibility to insert tooltips. I advise you to associate it with a Xvid compressor which is also free and allows you to make quality videos with a high compression ratio. If you want to add text as subtitles, you can use HandBrake which is also free. These are the programs that I will use in the next demonstration videos that I will do soon.

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