Vídeos (animação, chroma key, background)
https://www.videezy.com/
https://www.videvo.net/
http://www.xstockvideo.com/
http://www.clipcanvas.com/free-footage
https://www.cutestockfootage.com/
http://www.free-hd-footage.com/
http://www.motionelements.com/
http://www.ignitemotion.com/
https://www.nasa.gov/…/hd/HDGalleryCollection_archive_1.html
https://www.youtube.com/user/freeanimalvideo/videos
Audios (Efeitos FX, background)
http://freesound.org/
http://www.audiomicro.com
http://www.freesfx.co.uk/
http://soundbible.com/
http://www.pacdv.com/sounds/
http://www.flashkit.com/soundfx/
https://www.soundjay.com/
http://www.soundgator.com/
http://99sounds.org/free-sound-effects/