Thank you for your replies!
Well, the teeter... We were disqualified for it but everbody knew my dog after this run...
No idea why she did it, I never let her correct the teeter like that, I guess she got the idea that day. It was really too bad, our chances weren't that bad in this run if we had gotten through, but yeah, that's agility!
"A-Lauf Samstag Verlaufen" means that I (!!) GOT LOST during the run... Almost at the end, when the people on the sideline start yelling "Neiiiin", that's when I take one obstacle too much on our way forward... So "verlaufen" basically means "I got lost"! ;o)
And it is the same dog in the picture and in the videos, it's Beast (as Liesje already posted - thanks!).
The "bunny hops" on the last run - I could kill her for that. But at least she stayed until I released her, so it was quite ok!
And thanks for the other video and your explanation! Unfortunately I'm not really familiar with the different classes/courses in America, but I'm not giving up for some American contestants someday.
We have 3 different levels of difficulty here in Germany (due to 3 different performance classes [not sure if this is the right word here]). This means that there were also 2 lower levels with different (and slightly "easier") courses.