The universal app (Linux) allows running Avidemux without installation. Al what is required to run Avidemux is in the container.
Download latest app like: avidemuxUniversal_amd64_161120_88.app from the avidemux website: http://www.avidemux.org/nightly/appImage/ .
16 = year
11 = month
20 = day
Right mouse click on the downloaded file.
Select properties in the opening window.
On Tab Permissions in Execute, enable [v] Allow executing file as program.
Click [Close]
you should no be able to run by double clicking on avidemuxUniversal_amd64_161120_88.app