Regular animations work fine, and it will resize WEBM animations if the video hasn't been loaded yet, but after you push the play button the keyboard shortcut stops working.
Topic: WEBM animations won't resize with the keyboard shortcut once the video starts playing.
Posted under Site Bug Reports & Feature Requests
kyuubinaruto18 said:
Regular animations work fine, and it will resize WEBM animations if the video hasn't been loaded yet, but after you push the play button the keyboard shortcut stops working.
E6 shortcuts are disabled when you focus on video player, because it may have its own shortcuts. Click anywhere else to unfocus it.