You’ll may want to get a decent tripod or selfie-stick so you can get in front of the camera. Make sure your review is in focus at all times. Close ups are effective for showing product.
Don’t just stand there, do something! Handle the product or demonstrate it while you speak. Don’t jump around from shot to shot too much – this isn’t a music video. Too long on a shot and people get bored – too much jumping around and people glaze over.