Some tips from a fellow idiot who makes videos in a Stormtrooper costume.
1. Don't worry about perfection. You're a person with a job and life outside of this. It takes more time and effort than people are aware of to make things look good. I have the all the tools to do better, but I embrace the wonkiness in my videos.
2. That being said and as other have said the sound needs to be improved. It is very hard to hear you. Either get a separate microphone or play around with your sound during editing. You can raise the volume and reduce background noise in post-production. But a new mic will give you the best sound.
3. If you're going to speaking helmetless don't wear one in the first place. It prevents helmet hair. Better yet record and reuse the same intro with the helmet on. Throw in a title card with the subject of today's lesson. When you return on camera, you'll look fresh face because you never had the helmet on.
4. A tablet can help as a teleprompter. If you've got 5 scripts written it be sure to recorded most of them in a row. Setting things up to record and getting armored up is an ordeal.
5. I use a green screen background. You can also build a mini Star Wars set. Another option is using your real-life kitchen. It is cheap, easy and adds a touch of humor. Why is the guy in stormtrooper standing next to the fridge? Thrown in a few props. Maybe find a Star Wars theme coffee mug and you can be in the Stormtrooper break room. As the veteran trooper giving educational advice to the rookie troopers. I watched this and just see college instructor who giving a lecture who just happens to be in Stormtrooper armor. Try getting more in character. It will engage the students more. We know how to talk to students in a normal class but how would a Storm trooper talk to the troops?