Since the filename is just a string of numbers, you can use these methods to figure out what the video is:
On : Select the file and press Command + I to view the file inspector. 1_4918353903201812868.mp4
You can use the default gallery app, or download mobile versions of VLC or MX Player if the native player fails to read the file's encoding. Since the filename is just a string of
The MP4 container is widely supported, but the video inside might be encoded with a rare codec. Try dropping the file into an online converter like Ezgif Video Converter or CloudConvert to re-encode it into a standard H.264 MP4. Try dropping the file into an online converter
⚠️ Never open video files from unknown or untrusted sources. Malicious actors sometimes disguise malware as media files. If you did not intentionally download this file, it is safest to delete it immediately. 🛠️ Common Fixes if the File Won't Play