YouTube autoplay feature not working

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https://usingphp.com/post-type-generator

When I use

<iframe width="560" height="315" src="https://www.youtube.com/embed/7i8GSNvVpfM" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> in a custom HTML block, it *should* work, according to https://developers.google.com/youtube/player_parameters, but it doesn’t, both in Firefox and Chrome.

I’ll ask some other folks to take a look.

Props to Clorith:

autoplay is a privacy issue. I use the “privacy badger” extension on Chrome. If I disable it, then the video auto-plays. So this is a browser issue — or a browser extension issue — rather than a WP one.

see also https://developers.google.com/web/updates/2017/09/autoplay-policy-changes