Update link with follow up video

The old link was 4 years old and the author has made a video on the same topic as follow-up.

README.md

@@ -252,7 +252,7 @@ Sometimes the classes are not in session so you have to wait a couple of months,
 - [ ] [Whiteboarding](https://medium.com/@dpup/whiteboarding-4df873dbba2e#.hf6jn45g1)
 - [ ] [Demystifying Tech Recruiting](https://www.youtube.com/watch?v=N233T0epWTs)
 - [ ] How to Get a Job at the Big 4:
-    - [ ] [How to Get a Job at the Big 4 - Amazon, Facebook, Google & Microsoft (video)](https://www.youtube.com/watch?v=YJZCUhxNCv8)
+    - [ ] [How to Get a Job at the Big 4 - Amazon, Facebook, Google & Microsoft (video)](https://www.youtube.com/watch?v=6790FVXWBw8&feature=youtu.be)
 - [ ] Cracking The Coding Interview Set 1:
     - [ ] [Gayle L McDowell - Cracking The Coding Interview (video)](https://www.youtube.com/watch?v=rEJzOhC5ZtQ)
     - [ ] [Cracking the Coding Interview with Author Gayle Laakmann McDowell (video)](https://www.youtube.com/watch?v=aClxtDcdpsQ)