Install MediaInfo, right click on video file, click "MediaInfo" and follow below path.
[Video_file] -> MediaInfo -> Options -> Preferences -> Change 'Output Format' to 'Text'.
If 'Scan-type : Interlaced' flag is present, then video is interlaced.
If anyone happens to have this problem:
from inside kdenlive, copy the video (even better: make a .zip and copy it)
also from there, navigate to a folder which is inside a Git project
paste the video or the archive there
still from inside kdenlive, open a Git Bash, then commit and push the pasted file
exit the file explorer and kdenlive
navigate to the same ...