are capture cards only used for live recording to your computer?
for example: gaming, u-stream, google chats and etc.
or can it help me with video preview playback quality and can I use it to import video from my camera to get a cleaner file?. I was going through Preferences and wasn't sure about some of the options in "VIDEO" (video preview display) and "PREVIEW DEVICE" and was wondering what are some of the benefits. I understand most of the video option stuff but video preview display I'm not sure what it's for and does it help me in my production and how. most of the time I'm editing music videos, vlogs and now I want to edit indie films.
I'm not a novice at some of these things and I'm not afraid to ask my SONY VEGAS FAMILY FOR HELP. so if you have any information please throw me a bone or two. tutorials a plus.