If you've found on your device, you’re likely looking at:
A video you watched that your browser "pre-loaded" to prevent buffering. 0h5hyaw6336fkv38rs086_source.mp4
Do you have a for where you found this file, or If you've found on your device, you’re likely
Right-click and check "Properties" or "Get Info" to see the "Date Created." It might just be the birthday video you thought you lost. If you've found on your device
A few kilobytes? Probably a corrupted thumbnail. Several gigabytes? You’ve found a high-def memory.
The suffix _source is a major clue. In video processing workflows, this typically denotes the —the high-bitrate, uncompressed version before it gets crunched down for streaming.