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Keep in mind, you can only start two videos simultaneously.<br />
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This means they will start out in sync + desync over time. The longer they play, the more pronounced the desync.<br />
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The easy way to maintain 100% sync over entire span of videos is to transcode them together as an over-under or side-by-side video. This will cause both videos to play with the exact same clock.
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Poster has stopped posting.<br />
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Julian's answer seems best.
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When page load One video is already played Having button show lyrics video,<br />
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Once user click lyrics video button show the Lyrics youtube video at the same page.<br />
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1. Now two Youtube videos play sync and automatically play Lyrics video is muted.<br />
<br />
2. Once one Youtube video is Pause automatically other video too paused.<br />
<br />
3. Once one Youtube video is Play automatically other video too Play.<br />
<br />
Is it possible Done in php/JS my above scenario.<br />
<br />
Once Possible Please give me solution.
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When page load One video is already played Having button show lyrics video,

Once user click lyrics video button show the Lyrics youtube video at the same page.

1. Now two Youtube videos play sync and automatically play Lyrics video is muted.

2. Once one Youtube video is Pause automatically other video too paused.

3. Once one Youtube video is Play automatically other video too Play.

Is it possible Done in php/JS my above scenario.

Once Possible Please give me solution.

How to play two  Youtube videos in sync in PHP?

PHP is a widely-used server-side scripting language especially suited for web development, powering tens of millions of sites from Facebook to personal WordPress blogs. PHP is often paired with the MySQL relational database, but includes support for most other mainstream databases. By utilizing different Server APIs, PHP can work on many different web servers as a server-side scripting language.

jQuery (Core) is a cross-browser JavaScript library that provides abstractions for common client-side tasks such as Document Object Model (DOM) traversal, DOM manipulation, event handling, animation and Ajax. jQuery also provides a platform to create plugins that extend jQuery's capabilities beyond those already provided by the library.