Personally I wish to see them punished in a manner that is free from any and all public scrutiny or influence, fair and in keeping with the high standards of the corps as per the UCMJ.
That and nothing more.
If that means jail time I will be disappointed to say the least.
If it means they get kicked out of the Marines I will personally also still be disappointed.
If their commanding officer and their platoon Sergent are not also punished appropriately I will be even more disappointed.
The person who leaked the film; if a Marine, certainly didn't follow the proper procedure for reporting the incident and should also be punnished accordingly.