Now, you must be aware of the exclusive platform of YouTube, which is called YouTube Premium. It is a paid service, but it offers much higher-quality videos, short films, and documentaries based on high-concept ideas. It is also a place where you can watch shows like Vsauce's Mind Field, Wayne, Origin, Weird City, etc.
If you have bought the subscription of YouTube Premium, then log on to youtube.com/activate to understand the download, installation, and activation procedures. The website youtube.com/activate will systematically guide you in all the procedures.