UFO fleets appear to be using huge massive space tubes as a method of transporting themselves in space.
These tubes are enormous, and UFO's can clearly be seen travelling within them. Teleportation tubes? Some type of space warp they've created?
Or is it possible they can create wormholes at will? Are they dimensional portals? This video shows what seems to be an area of space that is used as a transportation hub with many of these space tubes and UFO's visible. These tubes are also found in many different locations in space.