I just found a really simple way to get a space in your Youtube name. Sign out of your account if you are signed it, and hit create account.
Now where it says Name and Last Name, that is going to be your YouTube name. For example, I made one named Chuck Norris lol.
Then you create the rest of the account and your done. I think this literally just came out today and remember no names are taken I'm pretty sure there's a lot of other people with Chuck Norris too so enjoy!'''
Just thought I would share it with you guys!