There is a well-known program called Fraps- Fraps is a good screen recorder and it also shows you your framerates while playing games. You can download it here: http
/www.fraps.com/
As to starting your channel, I suggest advertising. If you have Facebook, then you can do a quick shoutout like "Hey everyone, just started a YouTube channel-check it out!" -something like that. Good luck and have fun!