自定义YouTube BBcode <object>不允许全屏观看

Question

I want to create custom BBCode for Youtube that will allow the user to open a full-screen video on my website. When I hover over a "full-screen" button it says:

full screen is unavailable

I tried to add these attributes to my code: frameborder="0" allowfullscreen, and some other combinations, but to no avail.

 <object width="596" height="335">
     <param name="movie" value="https://www.youtube.com/v/WPni755-Krg">
     </param>
     <embed
         src="https://www.youtube.com/v/WPni755-Krg"
         type="application/x-shockwave-flash" width="596"
         height="335">
     </embed>
 </object>

Answer 1

The issue is in the code you used to embed the video. Instead of using the built-in embed feature from Youtube, you attempted to add it to the page as a .swf using <object>. This code should work properly:

<iframe width="560" height="315" src="https://www.youtube.com/embed/WPni755-Krg" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>