Why do html audios and videos fail to play in the browser yet they play in html viewer and wps office?

Question

I use chrome as my default browser but I Don't know where the problem comes from even if I use sololearn.Here is the code (which I wrote using notepad);
For audio
<audio controls loop autoplay>
<source src="file:///storage/emulated/0/download/song.mp3" type="audio/mp3">
<source
src="file:///storage/sdcard0/music/try.wav" type="audio/wav">
It seems like your browser doesn't support audio
</audio>

For video;
<video controls loop autoplay muted>
<source src="file:///storage/sdcard0/movies/driver.mp4" type="video/mp4">
<source src=" file:///storage/emulated/0/videos/funny.mp4" type="video/mp4">
Sorry your browser doesn't support video
</video>

Answer 1

You have to use an external source. Code playground can not access your internal storage.

Answer 2

Okay thank you Chris.Is that the same issue for the browser?