One is using a TV capture device, either card inserted into slot in computer, or a USB type. A cheaper way is to install some software that records your desktop. You open that and set to record, then start the program you are streaming, clk to full screen, and when finished, stop the recording. For large programs you might want to break it up into half hour chunks (files) and then run through a playlist when viewing it later.
Here's an example I just did for you. It's a 12 MB file size.
I use Linux Mint 14 operating system, this was done with "Record My Desktop" software into an ogg file, then converted to mp4 file.
Here's the original OGG type file. It's a 17 MB file size
I know how to hook my cpu to my tv, but can I transfer stuff from my tv to my cpu? I know of other people who have done it. They have gotten audio from their tv but I guess I'm not sure if they or if anyone can get video off of the tv. Am I just on a wild goose chase? Thanks for any help.