Well simply put this is for pros only. I only started searching for video help when I was fighting Jenova-Death and after that continued on without video help. There were other boss moments when I had to use video help but those moments were rare. I'm now near Sephiroth inside Northern Cave, waiting for the proper time to try and defeat him, and I have 150 hours of gameplay. x)
Also, I recently found out some secret bosses were not appearing for me so after I'm done with this save I'm gonna start a New Game once again to prove myself once more. :p
If I can do it you people can do it too. So don't give up and devote yourselfs to your efforts.
Take this as a challenge.