Steam locomotives testing

This is part of my steam locomotives collection.
It's everything I own, which is is not stored in original boxes.
Locomotives shown in video:
1. Bavarian D VI (DRG Class 98.75) by Fleischmann
2. PRR A2a/A3 0-4-0 by Model Power
3. DRG Class 80 By Marklin
4. DRG Class 24 by Marklin
5. DRG Class 64 by Piko
6. 729.02 ÖBB (BBÖ 729) by Kleinbahn