These videos are also available in an english version! Links below:
1. Technical terms:    • Technical Terms of Sailing | Free Vid...  
2. Theory behind sailing:    • The Theory behind sailing |  Free Vid...  
3. Closehauled:    • How to sail Close hauled | Free Video...  
4. Beam reach:    • How to sail Beam reach | Free Video S...  
5. Broad reach:    • How to sail Broad reach | Free Video ...  
6. Downwind:    • How to sail Downwind | Free Video Sai...  
7. Tacking:    • How to Tack with a sailboat | Free Vi...  
8. Beating:    • How to Beat with a sailboat | Free Vi...  
9. QuickTurn:    • How to sail the Quick turn | Free Vid...  
10. Sail up head to wind:    • Sailing up head to wind | Free Video ...  
11. Man over board:    • Man overboard | Free Video Sailing Co...  
12. Jibe:    • How to Jibe with a sailboat | Free Vi...  
13. Heaving to:    • Heaving to with a sailboat | Free Vid...  
14. Leaving the dock:    • Leaving the dock with a sailboat unde...  
15. Berthing:    • Berthing with a sailboat under sails ...