Technically under the law for signs, yes, even if you aren’t making a profit off of a trademark, you are still reproducing it without their consent. Of course, there’s not much chance you’d get caught if its for personal use, seeing as you and me, are small potatoes and not worth anything to large companies, and you don't go around telling every one. But openly selling it like I said just takes someone reporting you, and one may get a letter. Now doing it on a youtube channel isn't very bright. lol
I do alot of business signs even well known national brands. But they are the trademark license holders (business logos) as they have the rights, I am just making their logo for them.
I actually called Harley and submitted designs to get a license to sell. they wanted like $10k or 15k up front then you had to have 1 million in liability ins. So unless you can make and sell a thousand signs+ a year not worth that license.
Again like I said its not worth the small profit you make off a sign IMO to risk it, way better revenue streams then unlicensed trademarked items.