If you are trying to find the source of this video, searching for the filename online is unlikely to yield results because the name is unique to the device that created it. video_watermark1664808341007.mp4
Because this is a system-generated name, the specific content of the video cannot be identified by the filename alone. However, files with this naming convention usually come from: If you are trying to find the source
Apps designed to crop or blur watermarks often save the output with the prefix "video_watermark" followed by the time of export. video_watermark1664808341007.mp4