If you have the link to the file, the first part of the URL usually contains a channel ID or message ID. You can use the Discord Search function to look for the filename in the server where you found it.

If this is a file you found on a specific platform, here is how you can typically track down the "full post":

If you can describe the content of the video (the people, the setting, or the topic), I can help you search for the original creator or the social media thread it belongs to.

I was unable to find a public video or post associated with the specific filename 3cclzxdech_Zlbodu42kU.mp4 . This alphanumeric string appears to be a unique identifier often used by private servers, cloud storage platforms (like Discord or Google Drive), or specific content management systems.