<iframe style="width:100%;min-width:200px;max-width:350px;height:57px;border:0;overflow:hidden;" scrolling="no" src="//ytc.life/button/mp3/YOUTUBE_ID"></iframe>
<iframe style="width:100%;min-width:200px;max-width:350px;height:57px;border:0;overflow:hidden;" scrolling="no" src="//ytc.life/button/mp4/YOUTUBE_ID"></iframe>
Parameters:
&bg= color of the button (string - hex code without #)
Button does not work if used with "sandbox" ex: <iframe sandbox="allow-scripts allow-same-origin"...