Prove the integrity of evidentiary AVI files recorded with a digital camera

I need TO PROVE the integrity of evidentiary movie recorded with a digital camera
I record a .avi file with a Sony DSC F828 DIGITAL STILL CAMERA.That avi is now a criminal evidence .But i need to prove the integrity of file ( NOT EDITED).
What elements of that avi prove the INTEGRITY of file ?
The file was encoded with XING
The Code hash MD5 or Sh1 help ?
Did Sony have inserted some data elements in that file of a Sony Camera?
I need also to read all aditional data of file
I need some speciAL SOfTWARE?

God Bless m8 who wanna help me!