Enable video animation

Question:

How can I change speed or playback my video.

Answer:

Click the timeline bar you want to change speed of,
Click a button right to [Change speed] in the effect tray on the left part of the panel.
Reply with "Enable speed change" to the pop up message box.

You will find Change Speed yellow line under the timeline bar.
When you double-click the line, a "key frame" nod will appear on the line.
You can have multiple key frames to change speed or playback the video as you want.

Please refer to the manual for details.
http://loilo.tv/product/video_editor/24/desc/167

Please note voice is lost when you change speed of videos in this way.