Background video with sound and mute button

hello all
i’m designing a website for a singer and would like to add sound to the background video with mute/unmute button. does anybody have a way to do that?
if that is not possible is there a way to add a sound file that will begin playing automaticly when entering the site?

Here is my public share link: [LINK][1]
([how to access public share link][2])

[1]: http://

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