The codec inside your MP4 video container file is listed as "HEVC". That is a more recent codec than PrE version 15 was built for. 67 Original Video Kid - TikTok
Are you looking to this clip into a compilation, or do you need a specific caption for a platform like Instagram or TikTok? File format not recognised. - Adobe Community 18771mp4
If you are having trouble uploading or viewing the file, it may be due to an unsupported codec like HEVC (H.265) . You can often fix this by converting it to H.264 using tools like Handbrake for better compatibility across platforms. The codec inside your MP4 video container file