ESLinsider's courses have developed quite a bit since this video was made (in 2015). I added an outline and some details of the course below so to give you a clue as to what the course is like.
There are no longer "hour" courses because that's an industry lie when it comes to online TEFL courses.
Watch on Youtube:
What's an online tefl course like?
I can't speak for all courses so I will for mine. The video above is a little old and the courses have changed since. However I will try to explain.
The course contains:
instructional videos
multiple choice questions
writing assignments
forum and blog posts
feedback on lesson plans and assignments
18 levels (topics)
quizzes
It also depends on the course. You can see an outline of TEKA here.
TEKA Course outline:
Introduction (30 teachers share their experiences on video in Asia)
“Engrish” entrance exam
Teaching methods (7 different methods of teaching explored)
The teacher as a public speaker (How to captivate your students)
Learning styles (Learning styles and if they are accurate)
Lesson planning (Learn 2 different preparation methods + easy planning)
Presenting language (Learn how to introduce language to your students)
Teaching reading
Teaching speaking
Teaching writing
Teaching listening
Teaching pronunciation & phonics (Learn pronunciation tips that can be applied to all levels)
Midterm
Grammar
Using games & activities (for enhanced learning & engagement)
Teaching with songs (How to use music to teach)
Dealing with problems in the classroom (Solutions to common problems)
Classroom management (How to handle the most difficult students w/ little known tricks)
Classroom management tips
Writing your resume (Outshine the competition even without experience)
Finding jobs (Where to look, how to avoid scams and crappy employers)
Culture shock
Final exam
TEFL certification