They still don’t have access to the video from the capital. What makes them think the same judge who refused them access to that video will allow them to subpoena anyone? This is DC, the constitution is ignored there. Just look at how long they can hold people without due process on nothing more then trespassing.
If they get screwed at the trial level they are at least setting up a good record, and great stategy, for appeal. That’s all you can do. I think this is great lawyering at the trial level.