Update data-flow-tutorials.md

Author: kromerm

articles/data-factory/data-flow-tutorials.md

@@ -5,7 +5,7 @@ author: djpmsft
 ms.author: daperlov
 ms.service: data-factory
 ms.topic: tutorial
-ms.date: 04/17/2020
+ms.date: 05/25/2020
 ---
 
 # Mapping data flow video tutorials
@@ -46,6 +46,8 @@ As updates are constantly made to the product, some features have added or diffe
 
 [Lookup transformation](https://www.youtube.com/watch?v=9U-0VPU2ZPU)
 
+[Lookup Transformation Updates & Tips](https://youtu.be/MBskWoeuTLw)
+
 [Pivot transformation](https://www.youtube.com/watch?v=Tua14ZQA3F8&t=34s)
 
 [Pivot transformation: mapping drifted columns](https://youtu.be/5MygzCX0wnM)
@@ -54,6 +56,8 @@ As updates are constantly made to the product, some features have added or diffe
 
 [Select transformation: Rule-based mapping](https://youtu.be/5lf1lh1qMwU)
 
+[Select transformation: Large Datasets](https://www.youtube.com/watch?v=R5ea2_R0ouc)
+
 [Surrogate key transformation](https://www.youtube.com/watch?v=ISpegL9CbTM)
 
 [Union transformation](http://youtu.be/_Et6mg1tEr8?hd=1)