sorry, nothing visible in attachment for me
Are you recording to MP4 format? if yes, why do you think it is okay to ignore OBS's explicit note about recording to that format. Don't. period. auto remux in OBS to other format after recording is over instead if native recording-safe format won't work in your viewer/editor
And File Explorer in Windows has a database that simply lists file extensions with an app. Windows is NOT reading through a file and making an intelligent decision about its content (for the most part). You could take an Excel XLS file and rename to .MOV and it will show up in File Explrer as a video file.
So, have you tried opening the file directly in your preferred app?
