Some videos in the public domain.

[youtube https://www.youtube.com/watch?v=c_cGaNjqQ_g]

Posted by P Perkins, 2009

[youtube https://www.youtube.com/watch?v=mtwfuJUMQdA]

Posted by Christopher Lyford in 2010

[youtube https://www.youtube.com/watch?v=60dZs8ToTTM]

Posted by thekwan in 2013

[youtube https://www.youtube.com/watch?v=cqLZh8Jq8V0]

Posted by thekwan in March 2016

[youtube https://www.youtube.com/watch?v=oZoDvhIU3cA]

Posted by Phil Owen in April 13 2016