Updated screenshots and youtube link

README.md

@@ -79,8 +79,10 @@ Receives blood request from user & broadcasts to all other users in a location/c
 ```
 When Toshi supports ERC20 tokens, User can send HEAL Tokens to friends, family, hospitals & labs.
 ```
+> How it works
 
-
+<img src="https://raw.githubusercontent.com/paimpozhil/healchain/master/SS0%20-%20Toshi-app-SOS.png" width="200px"> <img src="https://raw.githubusercontent.com/paimpozhil/healchain/master/SS1%20-%20hospital-dashboard.jpg" width="200px"> <img src="https://raw.githubusercontent.com/paimpozhil/healchain/master/SS2%20-%20hospital-medical-records-store.jpg" width="200px"> <img src="https://raw.githubusercontent.com/paimpozhil/healchain/master/SS3-hospital-blood-donor-rebates.jpg" width="200px"> <img src="https://raw.githubusercontent.com/paimpozhil/healchain/master/SS4%20-%20hospital-request-payment-heal-tokens.jpg" width="200px"> <img src="https://raw.githubusercontent.com/paimpozhil/healchain/master/SS5%20-%20user-wallet.jpg" width="200px">
+Youtube presentation (Too short and took in a hurry!) https://www.youtube.com/watch?v=xENyytp5f_E&list=PL5qoO4Db_39W9uYZzvxe45eaU5Vb6mwt4
 ### Tech Stack
 
 > BlockChain