From your Media Library in Ensemble, click the Edit button for the video you want to work with.
Select the Manage Content tab at the top.
Select the Trim tab located to the top right.
Use the video controls to locate the starting point of the clip, click the Start button, move the control to the desired ending point of the clip and click the End button.
Edit the Title of your newly created clip, and then click the Save Clip button.
From the New title Created Successfully box that appears, select to either Create Another Clip, Edit New Title, or Go to Media Library.
When you return to your Media Library you will see the clip you just created as well as the fully intact original file.