一些高清图和视频的美术素材网站，基本工作中都会用到 https://pixabay.com/zh/photos/pixel/ https://www.pexels.com/ https://videos.pexels.com/ https://www.monzoom.com/index.php?c=free http://www.free-hd-footage.com/ https://www.freepik.com/ http://www.wedistill.io/ https://www.motionelements.com/free/stock-footage https://vimeo.com/groups/freehd/ https://www.videezy.com/