If the video has a specific frame that looks like a movie or famous clip, you can take a screenshot and use Google Lens to find the original creator or title.
If you have found this file on your device or in a browser cache, you can determine what it is by: LB-0gyt8jju9xm1qdcg551ke_source.mp4
If you found this in your browser history, look at the domain name preceding the file. For example, if it came from ://tiktokcdn.com , it is a raw video from a TikTok post . If the video has a specific frame that