The Pi Episode: Math Bites with Danica McKellar. This would be a great video to show on Pi Day. It is about 6 minutes long and entertaining and it also stars Winnie Cooper (I mean Danica McKellar). Make Middle School Math Pi Day an event at your school.
Chocolate Pie Crust: omg just think of the possibilities! This crust is the flakiest ever, thanks to a special technique, and the chocolate flavor is off the charts. The video tutorial makes it all so(Simple Chocolate Pudding)
Build Your Own Mini Arcade Cabinet With Raspberry Pi
Calculating Pi with Real Pies - Numberphile - Published on Mar 2013 How accurately can we calculate Pi using hundreds of REAL pies? Extended version of this video will be uploaded to Numberphile on Pi Day - March