Add Video File(s) :
Click Add File(s) in the Multimedia module edit panel. Select the required files. Several files can be selected by holding down the control key while left clicking each file with the mouse.
Click Open when all files are selected.
Edit Video :
Click to highlight the required video title and then click Edit.
Use the play/pause button to preview the video OR manually move the timeline pointer.
When the pointer is at the desired start / finish points, click Set as initial time / Set as end time.
Set the video volume by moving the volume slider.
Note: Once a video is edited, the duration cannot be changed in the Multimedia screen.