This one is a rush with Potatoes vs Potatoes in 6 mins with a suprise attack.
https://www.youtube.com/watch?v=9v2LGFKvmSo
Second video is from Legacy of the Void multiplayer Zerg vs Terran with new units to show (LIBERATOR FTW!)
https://www.youtube.com/watch?v=fkJXny7p7ZI
Another rush, this time with the Void Rays in 5 mins.
https://www.youtube.com/watch?v=QC-gvYAIkQI