Does outbound links and relevant youtube video improve onpage SEO?

should I add a link to Wikipedia and relevant youtube video on my homepage to improve my on page SEO score?

almost strongest backlinks point to my homepage, I'm worried about putting outbound link on homepage that will Decrease link juice to inner pages, should I do that?

sorry about this noob question.

No - STOP - start reading here http://www.blackhatworld.com/blackhat-seo/white-hat-seo/743171-stop-believing-these-10-search-engine-optimization-lies-right-now-truth-will-set-you-free-3.html

Yes, Having Authoritative and well-researched content with some reference to other external websites like Wikipedia or some video resources have good effect on SEO.