They are core components of all IS/IP. However, not all IS/IP is created equal - and there are other things that can enhance the level of IS/IP such as the spirals in aiki - but we are not talking about aiki here, just one form of IS/IP - aiki creates IS/IP, but not all IS/IP has aiki
I disagree. And I don't think that what that video is showing is the same as aikido elbow power. But that's my opinion.