I have an iframe which contains vimeo video How I can activate full screen flag in that video
Here is the HTML of iframe which contains video.
<iframe width="500" height="281" frameborder="0" src="https://player.vimeo.com/video/155984146?color=ececec&title=0&byline=0&portrait=0;"></iframe>
Just Use
allowfullscreen="allowfullscreen" mozallowfullscreen="mozallowfullscreen" msallowfullscreen="msallowfullscreen" oallowfullscreen="oallowfullscreen" webkitallowfullscreen="webkitallowfullscreen"
under your iframe tag then it will becom like this
<iframe width="500" height="281" src="https://player.vimeo.com/video/155984146" allowfullscreen="allowfullscreen" mozallowfullscreen="mozallowfullscreen" msallowfullscreen="msallowfullscreen" oallowfullscreen="oallowfullscreen" webkitallowfullscreen="webkitallowfullscreen"> </iframe>
Hi you have to allow full screen on your iframe.
just add webkitallowfullscreen mozallowfullscreen allowfullscreen to your iframe
<iframe width="500" height="281" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen src="https://player.vimeo.com/video/155984146?color=ececec&title=0&byline=0&portrait=0;"></iframe>
来源：https://stackoverflow.com/questions/35718776/how-to-activate-full-screen-flag-in-vimeo-youtube-video-in-iframe