I like your outro more than your intro. But I'm not a fan of the revving because I find it quite unpleasant to listen to, since its quite loud. However, the background of your outro is really nice. I think you could use it for your intro too so they link together. For your intro maybe you could re-arrange it to give it a cleaner and more modern style. For example, I'd use the same background as your outro and put the name of your channel in the middle with your social media smaller in the corner. This way you'll put more emphasis on your actual channel name and branding which I think an intro should be more about. It doesn't need to be your channel name either, maybe a graphic or logo. Something to remind people of your brand.