I have been teaching English for more than 7 years to kids, teenagers and adults so the tasks that you require will be widely covered. Depending on the grammar rule that the video will be about, I will plan previously the lecture trying to cover all levels. My lectures tend to be very structured and organized so the student can understand and assimilate the rule as well as possible. I will also add some practical, realistic and present-day exercises in order to practice.
Besides, although I am a Spanish speaker, I have an American accent thanks to my trips to the USA, the classes I took over there and the fact that I worked as a liaison interpreter with American people.