Using Twitter and using Youtube to multiply traffic in your targeted sites are two different things. Twitter is much like a news platform while youtube is the entertainment one. There are so many tutorials out there teaching you how to use twitter to gain site readership unlike youtube which is less. In any way, harnessing the potential of youtube to gain big readership in your site is a big advantage. Unlike Twitter who needs lots of time span to gain the trust of your followers, youtube takes a shorter route of fishing big traffic in your site. But keep in mind that you have to work intelligently since users will most likely stick to the main site (youtube) instead of visiting to your blog.