blowing air in master cylinder problem

[martin182]

Hi,
Last time I had small accident... I broke up axle rear... so I changed this, and I changed wheel cylinder, springs, brakes shoe etc. (all rear brakes set)... and I bleeding brakes (rear cylinder wheel) and everythink was great... but when we closed rear vent then... was running blowing air in master cylinder (from FRONT brakes, wtf??) like on this movie....

https://www.youtube.com/watch?v=9ivN2PztDK8

pedal is working good but something is wrong, and I can't find any solution;/ can you help me?
sorry for my English I know he is like parts from china (do not offend Chinese) and sorry if I chose wrong section.
I have to try find solution abroad (USA, CANADA) because in Poland no one knows this car's, engine's like you... (you have many such cars, american muscle you know... you are masters) I love this car, I love American cars. help me fix my tahoe, please I don't want to sell it

Regards

I have tahoe 1996 5.7L