If you have the link, look at the subreddit where it was posted. The community (e.g., r/Gaming, r/Help, r/LearnPython) will provide the necessary context for what the video is teaching or showing.
You can take a screenshot of a key frame in the video and use Google Lens to find where else the video has been posted.
If you found this file in your downloads, try searching Google for the exact filename in quotes ( "wyk0dy4zyxu81" ). This often leads to the original Reddit thread where the video was discussed.