FC Schalke 04 is also holding its winter training at Aspire Zone in Doha/Qatar at the moment.
The following videos show
The tactical session
The following video shows most of the warm-up (unfortunately I have missed the start), a small tactical part without the ball, and different small-sided games (SSG). The SSG were played as 8 vs. 8 plus 4 on a small (~35 x 25 m) pitch before the entire field was used in a 10 vs. 10 fashion.
Crossing and finishing