http://nationalinterest.org/blog/the-buzz/swedens-super-stealth-submarines-are-so-lethal-they-sank-u... is a more thorough written article on the 2005 wargames the youtube clip is talking about. One small thing:
> the two-hundred-foot-long Swedish Gotland-class submarines, introduced in 1996, were the first to employ an Air Independent Propulsion (AIP) system—in this case, the Stirling engine
Maybe the were the first submarines to have this in their original design, but https://en.wikipedia.org/wiki/HSwMS_N%C3%A4cken_(N%C3%A4k) received the Swedish navy's first AIP system in its half-time upgrade in 1988.
> the two-hundred-foot-long Swedish Gotland-class submarines, introduced in 1996, were the first to employ an Air Independent Propulsion (AIP) system—in this case, the Stirling engine
Maybe the were the first submarines to have this in their original design, but https://en.wikipedia.org/wiki/HSwMS_N%C3%A4cken_(N%C3%A4k) received the Swedish navy's first AIP system in its half-time upgrade in 1988.