If you want Avidemux to be available for all users on the system, you can use the created deb packages, yes. Please be aware that the only purpose of these packages is to facilitate removal. They don't include any information about dependencies and the like.
Quote from: boospy on December 28, 2020, 11:59:45 PMSo must i install all these packages?
At least all non-dev ones. You can skip cli packages too if you are not going to use the CLI version of Avidemux.
If you only want Avidemux for yourself while following closely its development, you can disable packaging and run Avidemux without installation directly from the build directory using run_avidemux_template.sh script. Place a copy of it, renamed to your liking, into a directory in your $PATH and make it executable.
If the location of the build directory is not ~/avidemux2, you will need to adjust a couple of variables (self-explanatory) in the script first.