change links

Author: SpaceMercury

README.md

@@ -101,10 +101,10 @@ The site will be available at the local URL printed by Hugo, usually `http://loc
 The final version is also deployed at: https://com-480-data-visualization.github.io/scion-babylon/
 
 ### Process book
-The process book can be found [here](screencast.mp4)
+The process book can be found [here](report.pdf)
 
 ### Screencast
-The video presenting our final website can be found [here](report.pdf)
+The video presenting our final website can be found [here](screencast.mp4)
 ## Late policy
 
 - < 24h: 80% of the grade for the milestone