Keynote slide transition

Hi, I'm trying to set up a Keynote presentation to run automatically on my Mac.

I have mp4 format movies (of around 2 minutes each) embedded in several slide, followed by a slide with text, each time. At the end of the movie, I'd like to transition to the next slide, without having to click.

I've tried adding a time to the Build Out option on the Stop Movie effect. However, if I:

• add a time shorter than the movie, the slide transitions in the middle of the movie
• add the time of the movie, the slide waits for the whole time at the end of the movie before moving on.

I'm missing something. Can anyone help, please?