diff --git a/back_running/README.md b/back_running/README.md
index fff5a21..6a955e8 100644
--- a/back_running/README.md
+++ b/back_running/README.md
@@ -31,6 +31,7 @@
 
 <br>
 
+* [intro to backrunning on ethereum](https://www.youtube.com/watch?v=ApAJ1afUbBI)
 * [dune for Portion of Daily Gas Used by Backrunning Bot Contracts](https://dune.com/phabc/backrunning-bots-gas-consumption)
 * [backrunning study for bZx IDO](https://amanusk.medium.com/the-fastest-draw-on-the-blockchain-bzrx-example-6bd19fabdbe1)
 * [ef discussion on random ordering of equally-priced txs](https://github.com/ethereum/go-ethereum/issues/21350)