Adding background music supports blank moments when no one is speaking. If you can find a music related to your subject, it will support your point (eg: regional music for a presentation of local artisanal manufacture) In this example made by one of you, the title and the music put us right away in the mood: a fun and speedy activity!
https://vimeo.com/295800029 Where can I find music for my video?
You can find music on Youtube and download it through sites like ytmp3.
