To find the "full post" or the context of the video, you would typically need to look back at the where you first encountered the file or link.
Because this is a generic system-generated ID, there isn't a single "original" post associated with it across the internet. Instead, this filename indicates: 4_5971967277069766196.mp4
The numeric string is unique to that specific upload instance on Telegram's servers, but it does not describe the video's content (e.g., whether it is news, a meme, or a personal clip). To find the "full post" or the context
The filename is a standardized naming convention used by Telegram for files uploaded or shared within its platform. The filename is a standardized naming convention used
These filenames are rarely indexed by search engines like Google because they are hosted within private or semi-private messaging environments.