Add some Dynamics courses (#422)

* Add Cornell MAE 4710/5710 (SP20)

* Add Cornell MAE 4730/5730 (FA20)

README.md

@@ -1310,6 +1310,8 @@ introduction/id389259246))
 - [Self-Driving Cars — Andreas Geiger](https://www.youtube.com/playlist?list=PL05umP7R6ij321zzKXK6XCQXAaaYjQbzr)
 - [Signal Processing: An Introduction by Nathan Kutz](https://www.youtube.com/playlist?list=PL6Vi_EcJpt8E96_JTKoOKY3HYWVGjf6b4)
 - [UC Santa Barbara ME 269 Network Systems, Dynamics and Control fall 2021, by Francesco Bullo](https://www.youtube.com/playlist?list=PL7bpQ3f3TaeMsueY06FCmbNIEOOY-Ri2_)
+- [Cornell MAE 4710/5710 Applied Dynamics spring 2020, by Andy Ruina](https://cornell.hosted.panopto.com/Panopto/Pages/Sessions/List.aspx#folderID=%229b14904e-5cd8-4ada-b0ff-ab4901537d09%22) ([Part 2](https://vod.video.cornell.edu/channel/MAE%2B4710_5710%2B%2BApplied%2BDynamis_%2BSpring%2B2020/248138383))
+- [Cornell MAE 4730/5730 Intermediate Dynamics fall 2020, by Andy Ruina](https://vod.video.cornell.edu/channel/MAE%2B4730_5730%2BIntermediate%2BDynamics%2BFall%2B2020%2B%2BRuina/247509122)
 - [CMU 16 299 Introduction to Feedback Control Systems spring 2022, by Chris Atkeson](http://www.cs.cmu.edu/~cga/controls-intro-22/)
 - [University of Wisconsin-Madison ECE 332 Feedback Control Systems fall 2021, by Steven Fredette](https://www.youtube.com/playlist?list=PLIygTcviGPKB7-l9W1KHtBFUMvbskh5iR)
 - [MAE 509 Linear Matrix Inequality Methods in Optimal and Robust Control, by Matthew M. Peet](https://www.youtube.com/playlist?list=PL5ebyVGQORm6n158o-I_liUZ7Q5Od43li)