Pericardiocentesis. This video was produced by the US Navy as part of their Operational Medicine CD. The 1-minute clip was drawn from the longer (10 minute) US Army video, Emergency Surgical Procedure: Pericardiocentesis..
Both show the technique of insertion of a tube into the pericardial sac to remove fluid or blood, improving cardiac function..
The video clip may be freely downloaded according to the information on the provider's website.
The longer video in higher resolution is available on CD.