Nice production.

I hate to be a pooper of sorts, but I can't let go unmentioned a
dangerous practice that is seen to be deliberately done by pilots in
the video:

Taking off with a wing low.

This can put a glider on it's back, or nose straight down in a flash.
It is very dangerous and happens before the pilot can even react. Even
if he/she does reactr extremely quickly, it'll still put the glider
into the ground nose first at high speed. This has happened several
times and I saw a picture sequence of just that in Aerokurier years
ago.

In a cross wind, a launch should still be wings level - always. After
the glider is over the safety altitude, the pilot can correct for the
cross wind - not before. So as not to be distracted by

What happens is that should a wingtip drag enough or God forbid snag,
full rudder may not be enough to correct and the other, high wingtip,
will rise up, turning the nose to the ground. If the pilot delays
releasing for even an instant, the glider will continue rotating till
inverted and lands nose first inverted or it smashes into the ground
nose first, going 90 degrees or so from the launch direction,
depending on glider type and relative position, tip drag, etc...

So please. Always launch with wings level, even in a strong cross wind
till safety altitude. Winch Launches are different from air tows and
require different considerations.
action.