For some reason YouTube videos in my website do not get the fullscreen button, even if I added the parameter allowFullScreen set to true both in the object and embed tag.

Here's an example page: http://www.indievault.it/2011/11/09/indie-vault-alla-games-week-2011-online-la-video-gallery/

Just take a quick look at the source. The allowFullScreen param is there, but the button won't show. Here's an excerpt from the code in that page:

<object width="540" height="325"><param name="movie" value="http://www.youtube.com/v/dvYQhJwwkgA"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/dvYQhJwwkgA" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="540" height="325"></embed </object>

This works for me

<object width="540" height="325"><param name="movie" value="http://www.youtube.com/v/dvYQhJwwkgA?version=3&amp;hl=en_US&amp;rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/dvYQhJwwkgA?version=3&amp;hl=en_US&amp;rel=0" type="application/x-shockwave-flash" width="540" height="325" allowscriptaccess="always" allowfullscreen="true"></embed></object>​
  • Did this work for you? – Anagio Mar 11 '12 at 8:47

Try to change your code with this one:

<iframe title="YouTube video player" 
              width="540" height="325" 
              frameborder="0" allowfullscreen>
  • Tried it, but still no fullscreen button... any other idea? – pt2ph8 Nov 12 '11 at 11:39
  • Plus it does not work on iOS. – pt2ph8 Nov 12 '11 at 12:25

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