I wish to upgrade my computer and I started researching online. I found many discussions and rumors but the only thing they did was confuse me. What should I consider when building a PC for filmmaking? Do I need more RAM's, a better processor or should I invest in the newest high tech video card? Which matters more, GPU or CPU?

The truth is that the reason you got confused is because you haven't decided on a budget or what you need the PC for. You might just be looking on having the best PC, and the best PC is subjective. It depends on your preference, what you need to use it for.

Is it for basic video editing, audio, colour correction or data capturing? Once you have that on lock, you can restart your research and you will find the PC Build for you.