am really new to this editing thing. I don't know how to speak the computer editor hitfilm language. All I know is I have been trying to edit a video and every time I click on something it stops responding and I have to wait 2-3 minutes and then I click again and it does the same thing again. Now they say I have to download some sort of Avid DNxHD Codec. What is that, where does it download to, how does it work, where do I put it, and how do I use it? If you have to speak the computer editor hitfilm language please be really detailed about it. Thank you.