How to swap sides of side-by-side video chat interview?
Using ffmpeg,

ffmpeg -i recording.mp4
  -filter_complex
     "[0]split[a][b];
      [a]crop=iw/2:ih:0:0[r];
      [b]crop=iw/2:ih:iw/2:0[l];
      [l][r]hstack"
  -c:a copy switched.mp4


Two crops of the video are made and then joined in opposite order.



Using swaprect filter,

ffmpeg -i recording.mp4 -vf "swaprect=w/2:h:0:0:w/2:0" -c:a copy switched.mp4