Some worked but the important ones didn’t. This one was the closest to recording the door, and is the one you’re referring to: New footage from the day he died with no cut before midnight

Very convenient indeed… and did I mention that the cameras didn’t work that day?

The answer is pretty simple actually. When he died, he had just been removed from suicide watch.

After six days, psychological staff removed Epstein from suicide watch following a psychiatric examination

Edit:

When Epstein was placed in the Security Housing Unit (SHU), the jail informed the Justice Department that he would have a cellmate and that a guard would look into the cell every 30 minutes. These procedures were not followed on the night he died.