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Control the play of two media using JavaScript.
Try this:
function Players() {
var audio_player = document.getElementById('audio');
var video_player = document.getElementById('video');
audio_player.play();
video_player.play();
}<button onClick="Players()">PLAY</button>
<br>
<br>
<audio id="audio" controls="controls">
<source src="audio.wav" type="audio/wav">
</audio>
<br>
<video id="video" width="320" height="240" controls="controls">
<source src="movie.mp4" type="video/mp4">
</video>