I have a youtube account (ibecrazedbear) I want to be a big thing so I want to do commentaries on minecraft and to challenges suggested by suscribers. I don't want to download something I don't know and get viruses on my computer. I don't want to pay 30$ either for one account. I want something free and no download even if I do trust that website it also might be hacked.
How to record my screen WITHOUT download?
Now all the good softwares you will have to download. I also do youtube videos (darksteelvideos) and sold some of my film gear to get game recording equipment. I use fraps for my recordings and avermedia for my ps4 and xbox one games. It's a fun route but don't do it for the fame, do it only to have fun. There's also a software called Action, which is I think under 30. Action has great quality and saves memory. But take note, a good pc very much needed.
Yup, you'll need to download something. Generally popular software is quite safe. It seems everyone has a favourite - mine is Bandicam. It's clean and has no viruses!
Well unless you already have a recording software on your computer, your going to have to download something. So, yeah.
HyperCam is very good and trustable, and as the other guy said, you have to download something.