You can't learn forex or trading from anyone else. I mean that's not something you can learn from courses, just my personal experience. You can take help of videos to learn the basic and how market moves but to make profit you need to get a demo account and start learning yourself. Proper risk...
They are easy to rank for, But they are not going to generate much views. Plus creating quality videos are not that easy, those old days of creating shity videos and putting aff link in description are gone. You can always try to see if its profitable.
Only three things uptime, fast server and reliable support (If you dont have root access or your not technical).
I am using OVH, they got fast servers and good uptime and non existing support. I am happy. Its hard to get all three together.