Insert movie scene in Libre Office Impress?

For a lecture, I would like to insert a short film scene from a DVD into the presentation program Libre office Impress. The operating program of the laptop is Windows 8. Can you help me with my problem?

For this you have to extract the video first from the DVD and crop.
The joining is easy:

Click to specify where to insert the file.
Choose Insert - Movie and Sound.
In the "Open File" dialog, select the file you want to insert…
Activate the Link check box if you want to link to the original file.