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Camtasia is another option that offers better features for editing your own videos. Remember that you will upload finished videos to Panopto for use in your course.
See also Camtasia (LTS Knowledge Base Articles)
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There are a variety of tools through which you can locate streaming videos to use in your online course. This is a list of sources to consider. Remembering that online courses need to be accessible to all students, it is recommended you also review how to Find Accessible Videos and Check Video Accessibility.
Boise State University Albertsons Library - Streaming Video Collections
Filter search results by “Creative Commons”
Library of Congress Digital Collections
Limit Keyword Searches to “Films, Video”
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See also:
https://community.canvaslms.com/t5/Instructor-Guide/How-do-I-embed-a-video-in-a-page-in-a-course/ta-p/1125
Uploading Media to Panopto
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Other resources
See also Creating Multimedia (eCampus Online Navigator Knowledge Base articles)