There are several ways to enter an online class:
Students want to find you on the site. They will usually choose you according to your introductory video. So make sure your video is done professionally.
Activities and games are a great way to learn and practice a new language. It is mutually beneficial for both teachers and students.
Ensure that students feel comfortable
Video is important to include in an online course because most students learn easier through visual channels. The fact that you will most likely find the students watching videos than reading a book (and this applies to children and adults alike) already suggests that they will find lessons with videos more interesting and engaging.
A0 Total Beginners - A0 students learn English for the first time. Maybe they know a few words, but they can't create and understand sentences.