Now, once upon a time I made commentaries. Loved doing them, got pretty good feedback. But after someone who used to edit my video's (Upload them once they were done) stole my account with around 1,200 subs (For a kid I was pooping my pants over this) & deleted all my video's I lost interest. Now with a PS4 & a easily linkable account does anyone want to help me out with a few things?

Note: I am a Mac user.
-Looking for a video downloading software, hopefully don't need to change anything major to upload it again.
-I have wondershare which allows me to input voice but anyone have any other suggestions?

Thanks for any help.