Within Panopto, it is quite easy to edit a video, especially if you have paused at the right moments when making the video. You can trim off the start and end, and chop out sections in the middle, doing this for all the sources simultaneously.
Don’t worry about editing out umms and errs, these are a natural part of speech.
Note that the panel in the bottom right of the screen shows the progress through the video, and you can zoom on this to change the scale: zooming in can make it easier to find the right place to edit.
When you have finished editing, you’ll need to press “Apply” to implement your changes. It takes a bit of time for Panopto then to process your video, so it’s best to make all your edits and then press Apply (and check the result to see whether any further edits are required), rather than doing them one at a time and pressing Apply in between.
The basic editing instructions are at https://support.panopto.com/s/article/Edit-a-Video , and more advanced editing is covered at https://support.panopto.com/s/article/Trim-a-Video .
The University Replay team have made a short video illustrating how to edit out the start and end of a Panopto video. Note that the video demonstrates how to find your video in Canvas, but (apart from for Prelims) you'll need to go to the Maths Lecture Capture website instead. Once you've done that, it's exactly the same as is shown in the video.
You can edit secondary sources independently, so you can cut out a section of slides or similar. For example, if you have two (or more) secondary sources, you can edit carefully so that only one is visible at a time, if you want to know exactly what the viewer will look at. (If there are two secondary sources available simultaneously, then the viewer can choose which they see.) This is explained at https://support.panopto.com/s/article/Trim-a-Video
For more experienced users, in an emergency, you can even use this to fix your slides if you find a mistake after filming: you can record a separate feed within Panopto, and add this, then edit so that only the correct slide is available to the viewer at any one time. There’s information about how to add a stream at https://support.panopto.com/s/article/Add-and-edit-Video-Streams .