After watching the video, form small groups and prepare to perform a sketch based on the storyline of the video. There are three roles: the person who wants to learn to speak English with a flawless American accent, the person he explains this to (at the beginning of the video) and the accent coach.
It might be a good idea to replace the Frenchman of the video with a German who speaks English with a strong German accent.
The groups should try to work creatively, feeling free to deviate from the storyline of the video.