Simplify the following text for a Grade 6 native English-speaking person.
Original: DÃ rflein also accompanied Knut on his twice-daily one-hour shows for the public and therefore appeared in many videos and photographs alongside the cub .
Simplified: DÃ rflein also appeared with Knut on the twice-daily one-hour shows at the zoo . Because of this , he appeared in lots of videos and photographs with the cub , and became well-known in Germany .