If you are a Mac user, you have access to Quicktime Player, which you can use to record webcam videos or screencasts.  For information on how to record with your webcam, see here.  For information on how to record a screencast, see here.  

Once you have recorded your video, you can use Quicktime to do basic edits, in particular trimming.  Trimming a video on QuickTime Player is easy and allows you to edit the length of any video from beginning to end.  This is ideal to cut out any seconds of awkward beginnings or endings.

  1. In Quicktime, open the video you would like to edit (if you just finished recording using Quicktime, it will already be open).

  2. Select "Edit" from the menu at the top of your screen.

  3. In the dropdown menu, select "Trim" or hold "command" + "T" on your keyboard.

  4. A yellow trimming bar will appear around the length of your video at the bottom. Drag the "handles" to trim out the parts that you don't want. Everything inside the yellow bars will remain.

  5. After you've trimmed your video, select "Trim" on the right. You can preview your video by selecting the play icon at any time during the editing process.

  6. To save your finished movie, click "File" and then "Save..." from the top menu bar.

  7. Name your trimmed video, select where to save it on your computer, and then click "Save."