I'm trying to add the folder name as a suffix to some of my video files so I can merge them into one folder instead and still have them sorted, MP4s however are giving me trouble. It works just fine extracting data on other video formats like WebM, I've also checked it against non-video filetypes like JPG and GIF which all work fine. Strangely enough, it only applies to some MP4s but not others, and I don't see any meaningful differences between affected and unaffected files.
The only difference I noted is that looking at the file properties window, details tab, the MP4 files that don't extract have no data in the video details or audio details rows; and also the "protected" option on these files is left blank. The details for MP4 files that do extract does have content in the video and audio details rows, as well as the Protected option being set to "no". I honestly don't know if this could be the cause or how to change any of it, but its the only difference I found.
Making copies of the files or moving them to different folders does not fix it.