Can I make a background without photoshop??

U can use paint :D But i suggest using photoshop tho :) Its much more advanced and will male your background look more professianal ;) And there is 30 day trial before yu buy photoshop :D
Not sure if anyone said this already but you can also use psd files aswell in GIMP.
Im in a rush to bed as its 2:30am loool
depends on your operating system.. if you are on a pc.. you can use paint.. or you pretty much can find a free back ground buy simply typing free back ground for youtube in google....