Do this even good or can all of us put it on YouTube? – Add Music to Video :cut editor Review

Yes,I am new and idk if I can put it on YouTube cause I have been seeing other apps that can do that crate music and I’m just 8 years old so idk how to spell at all but I didn’t check it so I’m gonna put a 1
Review by pikachupikachupikachu on Add Music to Video :cut editor.