420视频下载地址

https://media.xiph.org/video/derf/

音频下载地址

https://github.com/espressif/esp-adf/blob/master/docs/en/design-guide/audio-samples.rst

mp4下载地址

http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4

http://vjs.zencdn.net/v/oceans.mp4

https://media.w3.org/2010/05/sintel/trailer.mp4

http://mirror.aarnet.edu.au/pub/TED-talks/911Mothers_2010W-480p.mp4

其他各种格式，MP4, flv, mkv, 3gp 视频下载

https://www.sample-videos.com/index.php#sample-mp4-video