If this is a movie file, it is almost certainly a high-definition copy of Danny Boyle's survival drama about Aron Ralston.
Do you remember or its approximate file size ? I can help you narrow down the exact content with that info. [Now released] Restore MKV Format Support - Adobe Community
B-roll footage of U.S. Marine Corps Major Norm Hatch (Ret.) visiting Camp Lejeune. 5. Social Media/Vimeo Upload There is a recent upload on Vimeo titled "357545-1-125996".