Usually, a file with a randomized name like this is generated by a specific platform. Return to the original email or website where you saw the link and look for a "Download" button or icon.
For videos hosted on websites that don't have a direct download button, tools like Video Downloader Professional for Chrome can often identify and save the file. Datei herunterladen Sa2dXR8w3qVbz8B4.mp4
If you are having trouble retrieving the file, here are the general steps to take: Usually, a file with a randomized name like