Most Samsung Galaxy and Google Pixel phones use this exact naming convention ( YYYYMMDD_HHMMSS ).
💡 If you found this on an old SD card or hard drive, it is likely a personal memory (like a vacation video or a morning clip) from that specific Tuesday in 2018. 20180807 090347 mp4
Some cameras use this format to organize footage chronologically. 🔍 How to find this video Most Samsung Galaxy and Google Pixel phones use