I want a html5 video to display an image before the first video frame, and have looked up the help text that says:
Poster: A URL indicating a poster frame to show until the user plays or seeks. If this attribute isn't specified, nothing is displayed until the first frame is available; then the first frame is displayed as the poster frame.
The poster image can be selected by clicking on the File Browser icon on the right of the text box
But when I navigate for images, noe image files are displayed, only video files. So I am not able to insert a jpg or png file.
Have I misunderstood this, or is it a bug?