Removing Metadata Title in mp4 files I was able to remove metadata titles in mkv files through mkvtoolnix with this code

@echo off
for /r %%g in (*.mkv) do ("D:\Programs\MKVToolsNix\mkvpropedit" "%%~g" --tags all:"" --delete title )


I want to do the same thing with mp4 files too which probably cant be done with mkvtoolnix. How do I do it?
You can try FFMpeg.  There are examples showing how to strip all metadata and removing just a single item isn't much different.
Try
ffmpeg -i in.mp4 -metadata title= -c:v copy -c:a copy out.mp4
This can also be done with exiftool as of version 11.39. Exiftool can also do it in batch without need of a script.
exiftool -ext mp4 -Title= /path/to/files/
This command creates backup files.  Add -overwrite_original to suppress the creation of backup files.  Add -r to recurse into subdirectories.