Translations:Avidemux - Cutting out sections of video/12/en
From Manjaro
Again we use the left & right cursor control keys on our keyboard to accurately position the point where we want to set our marker. Once found, go to Menu Edit > Set Marker A, then (unless you want to remove a section & retain another in the video) we slide the video's timeline to the very end (use the cursor control right arrow to be sure that you are at the very end of the video - this often matters) & then we go to Menu Edit > Set Marker B.