Hi Carolis. I watched your vids and they are great! I came here to say that the bugs you faced were fixed! Both charlie staying on the screen when talking with jerry and the ending cutscene staying there with no feedback if it was the real end or not.
If you feel like seeing the other part of the ending, you can press the number "3" on your Numpad(just wait until the end of the intro's dialog) to skip directly to the castle.