Bensound.com - nearly all creative commons licensed instrumental jingles
Creative Commons - contains a list of other sites and sources for creative commons music.
Sound Cloud
https://search.creativecommons.org
Jamendo https://www.jamendo.com/?language=en
FreePlay
LearnOutLoud.com - free downloads of audio indexed by subject
Soundzabounds- free music
YouTube Audio Library
Creative Commons https://creativecommons.org/
Insert Image feature in 365 - choose Creative Commons
Pixabay https://pixabay.com/
Pexels https://www.pexels.com/
Adobe Spark https://spark.adobe.com/ex/edu/
Canva https://www.canva.com/
Animoto
Thinglink
Museum Box
Storybird
Stupeflix
Adobe Slate
Smore
Glogster
Book Creator
ChatterPix
Wevideo
Aurasma
Powtoon
Go Animate
Animaker
Wideo
Moovly
Vyond
Doodle Marker
PowerPoint
Google Slides
Animoto https://animoto.com/
iMovie https://www.apple.com/imovie/
WeVideo https://www.wevideo.com/
KineMaster https://www.kinemaster.com/
VSDC Video Editor http://www.videosoftdev.com/
SWAY https://sway.office.com/howtosway
Video Editor in Microsoft
Final Cut https://www.apple.com/final-cut-pro/
InShot https://apps.apple.com/us/app/inshot-video-editor/id997362197