: If the file is literally named 9740mp4 without a period, your operating system may not recognize it. You can often fix this by manually renaming the file to include .mp4 at the end. 2. Identifying Content Source
Because the number 9740 is specific, it often points to a few common sources: ILCE-7RM4 - File Format (movie) - Sony Corporation 9740mp4
: If this is a video file named 9740.mp4 , it uses the standard MPEG-4 Part 14 digital container. This format is universally compatible and can be played using Microsoft Support's recommended players like Windows Media Player or VLC. : If the file is literally named 9740mp4