This video? This is a judo shiai. Why would anyone expect an Aikidoka to do better than a ranked Judoka in a Judo shiai?
Umm, that was no shiai. That was randori, this ( http://www.youtube.com/watch?v=cTiLVBiiYHQ
) is shiai.
Looks to me like two guys playing around. Neither one was trying all that hard to impose their will, just a friendly round of randori. It seems quite obvious to me that there was a lack of this kind of experience to the 'aikido' guy, he was unsure about his distance or how to get his partner to engage and failed to respond.
For example, at 1:25, the judo player grabs the elbow of the aikido player. For the next 10 seconds, they basically stand there in that position (it seems like the judo player was trying to embrace the spirit of randori and give his partner time to work).
In terms of critique, I would say the aikido player broke most of the grappling best practices. He never tried to control the 'inside loop' of the grips, always keeping outside grips and never having leverage or control of the judo player. He failed to maintain posture after grips were taken and was always not in control. He never once tried to deal with the grips that were taken, instead he seemed to actively ignore them. He also tried to use his weight and muscle to move the judo player (3:02 to 3:10 mark). While the judo player was the initiator of most of the contact, the aikido player never attempted to get him to over commit or adjust his distance instead letting the judo player control the distance.
That said, none of this has any relevance in the video or anyone's training. This was a not a competition or a street fight between these two guys of similar skill. It seemed obvious that the aikido guy was unfamiliar with this kind of practice and unsure of what was acceptable. He did at points show where aikido might work by setting up fient strikes that could have easily been real. This video says nothing about the state of either arts, but instead is a pretty good example of a great learning opportunity.
In conclusion, get out there and spar!