This video was filmed to accompany a full article on Reverse Lunges which can be found here: https://romanfitnesssystems.com/articles/reverse-lunge/
These are the basics of doing a reverse lunge. There are hundreds of variations, neither of which are better or worse, only different.
Key points:
Use your glutes.
All weight through the front foot heel.
Don't slam your knee into the ground.
Drive your hips up and through.