VIdeos not listed on my "channel"? (how do I do that)

#1
Hi, when I click on my name and go to that "account/channel" only 3 of my videos are on it. I'm not sure how I got those on there specifically in the past. But, how do I go on and add the rest of my videos to my channel?
 
#2
I finally figured it out poking around!! Next question, can I make another channel (it looks like I can) .. would it be under my name somehow? And most importantly, can I list the videos that I already have on my current channel (if so would it hurt at all)?