Hello noellyons,
I think I found the source of the problem. I am not really sure if your problem is caused by the same issue though.
With player 4 (= Flowplayer v3.1.x), Clicking on the splash image does not trigger the video to be played.
This issue is being occurred when player 2 (Flowplayer v2) is also used in the same webpage. As you already know you can use multiple instances of [hana-flv-player ] player in the same webpage. But when you use player4 first and then player2 next, there is problem with player4.
The reason is that Flowplayer v2 is older version of Flowplayer v3.1.x and they basically they use the same javascript function. So when you load player2, the Flowplayer v2's javascript is loaded and overwrites Flowplayer v3.1.x's functions.
So when Flowplayer v3.1.x (player 4) is calling the function, older javascript is called and failed to work as intended.
The best way is to use the same player for the [hana-flv-player] instances in the same page or post. If you are going to use player4 , you should use player 4 for the rest of the page.
Or if you are using other Flash video player plugin with Hana flv player, you could experience the similar problem where flash video does not work properly.