"Video is having a huge impact on education for both younger and older students, and that impact can be felt academically, socially, and financially. This panel from Streaming Media East explores them all."
This duplicates quite a lot of the functionality of Panopto, but the student Moodle video assignment (starts @3:25) looks nice. Kaltura is fundamentally an open source streaming server.
"TodaysMeet helps you embrace the backchannel and connect with your audience in realtime.
Encourage the room to use the live stream to make comments, ask questions, and use that feedback to tailor your presentation, sharpen your points, and address audience needs."
This page covers the technical aspects of hosting and pushing out these video clips, how to create and edit video clips and some practical applications. At the bottom of this page I've offered links to obtain video clips, royalty free audio clips and further information covering legal & copyright issues.
"Here's a look at over 30 content curation tools (mostly free, but some paid/professional tools as well) that will help you cut through the clutter of your information stream to find the gems."