I will be grateful for detailed advice
There are two 1920 x 1080 video files at the input
Just a video
Video with two audio tracks
The output is one video file 1920 x 1080
You need to walk along one of the audio tracks from the second video (always the same) and at those moments when there is silence on the audio track, show only the first video.
When there is sound on this audio track, show both videos as in the screenshot:enter image description here
