add additional video links

NathanBlecharczyk.md

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 ## Nathan Blecharczyk — Founder, Airbnb
 
+http://youtu.be/Ya0I6oz7q9U
+
 Built the sophisticated software infrastructure behind Airbnb.
 
 Thinking back, there a lot of things that Nathan has done that have helped him to be successful now. Every experience on your journey should be additive — building up to the moment where you go to the Olympics. You need to have confidence to persevere — Nathan got it by doing programming through high school/college.

PhilLibin.md

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 ## Phil Libin — Founder, Evernote
 
+http://youtu.be/KEy_ocXnrdY
+
 What we went through at Evernote in the early years — mistakes we made, lessons we learned. Evernote didn't come out of nothing — was our 3rd startup.
 
 First real one was with a few college roommates: Engine 5. Most important lesson was to have great cofounders. Same team of people at the first, second startup; even at Evernote. Cultivate this group of really brilliant, high-energy, willing to work for free, best friends for life. Kind of have to pay attention — Phil met these at the CS department at Boston University. You shouldn't even make friends with people you don't see starting a company with — why bother? You only have so many best friends, so use those resources wisely. Developing this crew is super huge.

RonConway.md

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 ## Jessica Livingston @ Ron Conway — Partner, SV Angel
 
+http://youtu.be/7bm-Xj2jMCk
+
 _Twitter first: what was it like when Ron first invested, what he saw in them?_
 
 Ron met Evan Williams because of Google/Blogger, invested in Odio which failed. Ev gave all his investors their money back, which is rare: 40% of SV Angel's startups go out of business, they get nothing back. This resulted in "amazing human feelings" -> Ron pledged to put $75k in whatever Evan did next.
@@ -49,4 +51,4 @@ When Google started, the algorithm was intellectual property. Today, it's the de
 
 _In all these years, what has Ron been surprised by?_
 
-Watching entrepreneurs mature at the speed of light when they have to. Larry Page, Jack Dorsey, Zuckerberg, Ben Silbermann — as their companies took off, the founders had to mature, manage thousands of people, keep their product focused. All four of these people met these expectations. Watching that happen and helping them do it was the most satisfying.
+Watching entrepreneurs mature at the speed of light when they have to. Larry Page, Jack Dorsey, Zuckerberg, Ben Silbermann — as their companies took off, the founders had to mature, manage thousands of people, keep their product focused. All four of these people met these expectations. Watching that happen and helping them do it was the most satisfying.