Why isn't there a "play" triangle in the middle of my video rather than the little play line beneath the video? Is there a way to make it so all the user has to do is click anywhere on the picture to begin playing the video?
Any chance your video is in a WMV, AVI, or MOV format?
The look of the video is determined by the controller and each format uses their own controller. Your reference to the large play button over the video, which allows the user to click anywhere to start playing makes me believe you're thinking of Screencast.com's Flash player.
If you put an MP4 video on Screencast.com you'll see the big triangle.
How are you hosting your video? Right on Screencast.com, embedded on your blog or website, or other? We might be able to get creative depending on your situation. Can you share a link as an example?