Pardon me, but how did you come to that conclusion?
If you pause the vid on the 22sec mark, you can clearly see some of the people in black jackets are clearly not Chinese. A few of them can actually be seen scanning the area too.
At the 25sec mark, it is true that there are a few Chinese behind Obama. However, there are also several non-Chinese as well.
I see you have made no mention of the link with 22 vehicles in the Queen of England's motorcade. While it is true that 22 vehicles isn't close to the 33 in the Chinese President's motorcade, it should also be noted that the 22 may not have been the entire motorcade as the last bit of the video didn't show the rearguard outriders (as is the case for all motorcades of this nature). Thus, that particular motorcade may have been larger than 22 vehicles.
Anyway, I still looking for links that are available on the internet. I must say that I'm rather disappointed that my local news footage can't be found on the internet, particularly those of the Queen of England's visit to Singapore in Mar 2006.
--- EDIT ---
President Clinton and his 20 bodyguards walking around London:
Check out post #467 by sigmeister with plenty of pics on the US Secret Service that protects the President:
Also, check out post #368 by Icebergtz with pics showing the protection given to US Presidential candidate (at that time) Obama:
And this is an interesting article about Protecting President George Bush:
And here's 1 of the few pics that actually show the security around the Queen of England (in this case, with the President of Turkey, in Istanbul):