Below is a starting point for stock video sources.
Vidsplay - Free Stock Video Footage https://www.vidsplay.com/
Dareful - Free Stock Video Footage Dareful - https://www.dareful.com/
Life of Vids -Free Videos, Clips, and Loops https://lifeofvids.com/
Mazwai -Free Stock Video Footage https://mazwai.com/
Mixkit - Free Stock Video Footage https://mixkit.co/free-stock-video/
Pexels - Free Stock Video Footage https://www.pexels.com/videos/
Pixabay - Free Stock Video Footage and Clips https://pixabay.com/videos/
Videezy - Free HD Stock Footage & 4K Videos https://www.videezy.com/
Videvo - Free Stock Video Footage https://www.videvo.net/
Incompetech Free Music https://incompetech.filmmusic.io/search/
Bensound Royalty Free Music bensound.com
SoundBible Free Sound Effects Free for all projects Attribution 3.0 https://soundbible.com/
Unsplash Free images, videos, and audio unsplash.com
Soundjay Free Music and Sound Effects Free for all projects (personal use). Giving credit suggested by not required https://www.soundjay.com/tos.html
Fesliyan Studios Royalty Free Music and Sound Effects Free for non-commercial use https://www.fesliyanstudios.com/policy fesliyanstudios.com