It mainly consists of BMPs and trucks, like these:
A mobile kitchen:
At least two ZU-23 airdefense on the back of a truck:
Several trucks with Infantry:
One MT-LB for command and control:
Gas for refuelling:
One truck towing another (because it broke down on the route):
A medical unit?
Civilian buses for transporting personnel:
The consistency of this convoy clearly indicates that this is a complete battle formation that traveled a long distance. In other words: a fresh Russian convoy has entered Lugansk.
Earlier similar troops had been filmed LEAVING the area North of Lugansk:
VIDEO Russia's Hybrid Army near Shchastya on rotation/moving to Lugansk
— Ukraine@war (@DajeyPetros) May 22, 2015
So it looks like the new ones have been coming in...