So i tried this command from windows

When i try this command in windows.
(echo file 'first file.mp4' & echo file 'second file.mp4' )>list.txt ffmpeg -safe 0 -f concat -i list.txt -c copy output.mp4
it seem to work, but when a video ends the video resolution switches which break the media player
well i tried
ffmpeg -safe 0 -f concat -i list.txt -vf scale=640:360 -c copy output.mp4
it seem didn’t work.
So i had to concatenate then type the video filter scale, but it takes long.
How to do it?