Beginning Jiu Jitsu Moves : Kimura Lock from the Guard Position in Jiu Jitsu

so do u push with the arm dats grabbin the opponents wrist or ur wrist?

Um no. Japanese Jiu Jitsu has it's roots in feudal japan. Judo is Jigoro Kano's derivation of jiu jitsu.  Brazilian jiu jitsu is a derivation of Judo.

You need to be strong to train BJJ, doesnt really matter about size

Im not sure if jujitsu is suitable for little people......look at the size of these guys....that's why most small people do aikido.....

jiu jitsu is for small people,(helio gracie the founder was very smal) you may not be able tobeat a heavy higher belt than you but if your 140 pounds and you have to defend yourself against 220 pound guy that doesnt train and doesnt understand jiu jitsu you will do much better than if you try to use your akido against the guy

I agree with you that Jiu Jitsu is more effective than Aikido in a reality based street confrontation, though the Aikidoka will avoid the fight as much as possible, the Jiu Jitsu player would probably stand his ground and fight.  This is the trouble with MMA, Boxing and Grappling styles, is that they have weight devisions...........but any little guy that I have seen win a fight is quite physicaly tough himself.........

you are absolutely wrong, one of the great things about jujitsu is that size is not a nesecery factor

OK, that's good to hear:)

best way to learn it is just practice,go roll with some friends, work each other..
And btw.. this is a good vid!, especially how he explains WHEN to do it, and HOW to transition your hips.. when ur on ur back.. thats key...

Yea, took me 4 years to get 1st Degree myself.