Queen Online Released and remastered some tracks of concert of the '70
Here the links
 White Queen Rainbow 1974 link 1 http://www.youtube.com/watch?v=-6Ci8RWhPAk link 2 http://www.youtube.com/watch?v=tYOSPifD62w
Killer Queen Earls Court 1977 2nd Night link 1 http://www.youtube.com/watch?v=fTbQ_En71Mc link 2 http://www.youtube.com/watch?v=1jLU3F8nDsQ
The Millionaire Waltz Houston 1977 link 1 http://www.youtube.com/watch?v=LmeQOIoAwu4 link 2 http://www.youtube.com/watch?v=uCeEcWwe52w
My Melancholy Blues Houston 1977 link 1 http://www.youtube.com/watch?v=cUV0ZUhPUM8 link 2 http://www.youtube.com/watch?v=EcMnMlJL5Q4
Dreamer's Ball Paris 1979 http://www.youtube.com/watch?v=pn-41y46XGs
We Will Rock You (Fast) Tokyo  1979 http://www.youtube.com/watch?v=aWLleeg_8sA
Let me Entertain You Tokyo 1979 http://www.youtube.com/watch?v=zjzqM6Hfl_E
I'm in love with my car Hammersmith Odeon 1979 link 1  http://www.youtube.com/watch?v=VkQShnlJiHk link 2 http://www.youtube.com/watch?v=iADvvwXb8h4
Now i'm Here Hammersmith Odeon 1979 link 1 http://www.youtube.com/watch?v=CYFLUVRxqhc
link 2 http://www.youtube.com/watch?v=fE0ZUAr6sBM

Enjoy