The setMediaKeys() method of the HTMLMediaElement interface returns a Promise that resolves to the passed MediaKeys, which are those used to decrypt media during playback. 
 The setMediaKeys() method of the HTMLMediaElement interface returns a Promise that resolves to the passed MediaKeys, which are those used to decrypt media during playback. 
js
setMediaKeys(mediaKeys)
mediaKeys A reference to a MediaKeys object that the HTMLMediaElement can use for decryption of media data during playback. 
A Promise that resolves to the passed instance of MediaKeys.
| Desktop | Mobile | |||||||||||
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| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
setMediaKeys | 
42 | 13 | 38 | No | 29 | 12.1 | 42 | 42 | 38 | 29 | 12.2 | 4.0 | 
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    https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/setMediaKeys