Trimming (and replacing) a Podcast Recording (Instructor Guide)


This article is to help guide an instructor through the process of trimming an original podcast recording and replacing the original with the newly trimmed version. 

Things You’ll Need

Critical Concepts

There are three major steps in trimming a podcast:

  1. Locating and downloading the podcast
  2. Removing the unwanted segments of the podcast
  3. Saving and uploading the newly edited podcast as an .mp4 file

The final version of the podcast must be saved as an .mp4 file. The podcasting system will not accept any other video file types.

Steps to Take

0. Hide the Podcast (optional)

You can temporarily take a recording offline while you work on replacing it with the trimmed version. 

Screenshot: Instructor Control Panel Options

1. Download your Podcast Recording

To make edits and trim your podcast recording, download the recording file to your computer, so that you can edit it in your chosen video editor. 

  1. To download your podcast recording, navigate to your course’s podcast page. Login via 
  2. Select the correct recording of your podcast from the list of recording dates.
  3. Once the correct recording is selected, directly under the video player will be a “Download” button. Click on this download button to download that specific recording. 
  4. After clicking Download, your computer’s file manager should prompt you to save that .mp4 file somewhere on your computer. Save it in a location you’ll remember. (Note: if your browser doesn’t automatically prompt you to save the file, your browser may have a pop-up blocker, or other setting preventing you from downloading. Please try another browser, or check in your current browser’s setting for anything that might prevent this action.)
  5. You’ve now downloaded the podcast recording; you can proceed to trimming the video. 

Screenshot: Podcast download button

2. Editing/Trimming Your Recording File

Below, you will find links to external resources that walk users through the steps needed to trim video using Windows Photos app or Apple’s iMovie app. 

These are not your only video editing software options, but they are likely already installed on your PC or Mac computer. If you are using a different editing software, please refer to the vendor’s support site for trimming instructions. 

Windows 10: Trimming videos using the Windows Photos app how-to article (external site)

Mac: Trim clips in iMovie (external site)

Once you have done your edits and removed the portion of your recording you do not want, you will need to export your trimmed video into the .mp4 format. During the export process, many video editing software allow you to choose different export options. Below are some options you may want to consider changing – if your software gives you the option. Modifying these export settings can dramatically change the size of your final file.

Frame rate: Often listed as “FPS” – frames per second - ideally you want to export at a frame rate of 24 fps or less. The original podcast recording maxes out at 24, so anything extra is using unnecessary storage resources.

Resolution: The lower the resolution, the smaller the export file size, but you do not want to go so small that the video loses clarity. The actual resolution you want to end up with will depend on whether your video is videocast, screencast, or both (dualcast). For a single video feed (either video or screencast), your resolution should be no greater than 1280 x 720. For a dualcast, it should be no greater than 1920 x 540. A lower resolution is acceptable, as long as the final video meets your standard of quality.

Final video file size should be less than 150 MB. The final size of the file will determine how long it will take to upload to the system. Larger files have a higher potential to fail during upload.   

3. Uploading/Replacing Your Podcast Recording

After trimming and exporting your recording file in an .mp4 file format, you are ready to replace the file that currently exists in the podcast system. 

  1. Navigate to your course’s podcast page. 
  2. Select the correct recording of your podcast from the list of recordings on the left-hand side/or bottom of the page. 
  3. Once the correct recording is selected, under the video player will be the “Instructor Control Panel”. Find the section in this control panel labeled “Upload Additional File”.
  4. In that section, change the option in “Type of File” from “Lecture Notes” to “Replacement … (.mp4)”, then click on “Choose File” and locate your recently trimmed video file from the prior step.
  5. Once selected, return back to the Instructor Control Panel , click “Upload” at the bottom. (note: Depending on the file size, and the speed of your internet this may take some time. Please wait for the page to refresh with either a success or fail message.)

    Screenshot: New podcast upload menu

  6. If you receive a success message (in green) in the Instructor Control Panel, verify that the newly uploaded video was successfully replaced. If not, sign out of the podcast website and log back in to see if the original recording was replaced. 
  7. After you have verified the new upload, ensure that recording availability toggle settings in step 0 are set to online, as desired. 
  8. If you receive an error message after uploading, take note of the error message, and email with details around the error message and any other pertinent information (and trimmed file). The most common errors that occur are timeout issues – where your internet upload speeds aren’t fast enough for the system to upload your entire file. Another common error is an improper video file (something other than .mp4 being uploaded). 
If you receive any errors following these steps or have questions about your padcast options, please contact