If you want to try making your own videos, if you have the time, it's very easy, you should have some sort of video editing program on your computer, like maybe Windows LIVE Movie Maker, or something like that! That particular program is very easy to use too...I've used it for a while, however, I'm working my way up to being a little more professional, since i started making a few of my more recent videos with Sony Vegas Movie Studio which is a bit tricky, but easy once u get the hang of it :)
im using Windows Movie Maker and its pretty easy to work with. if you want to download videos from youtube you should get Free Studio Manager. i have it and its great :) you just have to search for it on google. i hope i helped you :)