Not so long ago there were Palombières everywhere; it was an important part of local hunting tradition. Often they were built up in the tops of the trees; unlike the one in the video which is on the ground.
These Pigeon Hunters 'hides' use both live and decoy birds to encourage the passing flocks to land on the branches above, and often hundreds would be shot in a single day. This practice has mostly stopped these days, but the huge flocks of migratory Pigeons still pass by; stopping en route for a night's rest. Last year I saw huge flocks passing overhead. The ones in the video are in the Gers; South of here and to the West of Toulouse.
In case you're wondering what the hunters do with hundreds of birds, well they freeze them whole; later just peeling them, and eating the breast meat only. The rest is usually, rather wastefully, discarded.
Here are Vincent and Arthur with hunter Bertrand Stiers, and his three sons.