I don't actually know how reliable any of them are, but you could always try those sites that have you do surveys and they pay you. One of my friends got a job as a social media manager and makes a pretty decent living just running a business' social media accounts. You could try blogging in addition to YouTube. During the first semester of my freshman year of college I did this online tutoring thing that was advertised by my calculus textbook. I tutored other college students that needed help with the same book I was using. I spent like 10 hours a week and made $14 an hour.