I it probably better to identify a particular aspect and address that problem.
Take Audio for starters - Software is free from click here and NCH.com
You only then have to address the connection between the audio system and the computer.
This will depend on location of both[can they be brought together- and a suitable cable[ a 3mm jack both ends of cable to go from phones out of audio to line in on computer.
There that got you started.
Video is a different story and it is best to list what you have - so that we can see what needs to be done.