A taste of some of our PC training...

Other suggestions/personal favorites but not particularly in PC training:

http://www.ted.com/talks/lang/en/william_kamkwamba_how_i_harnessed_the_wind.html

http://www.ted.com/talks/lang/en/amy_smith_shares_simple_lifesaving_design.html

http://www.ted.com/talks/lang/en/hans_rosling_on_global_population_growth.html

:-)