Maybe it is multiple drones stacked into a single tube? I don't expect the drones to be the entire length of the tube.
Besides, judging by the platform shown (a semi-trailer truck) versus the earlier iteration (a pickup truck) - Other than offering the capabilty to stack multiple identical drones within each tube (i.e. longitudinally) - The diameter of each tube should be comparably larger as well.
An educated guess:
1. Either the drones launched from this platform will have a larger diameter/overall dimension, hence allowing longer range and/or bigger payload; or
2. Each tube is capable of multipacking identical drones of smaller size, both laterally and longitudinally.