But many podcasts and forums and webinar videos here mention using property managers. 

BP has everything you need from free online educational videos to connecting to other investors, you can't go wrong on this site. 

The doorbells/video would be focused on the outside personal entrances of each unit but also the parking lots which would also capture the coming and going of the other residents in the community.Thank you for  your input!

Clayton has such great videos on investing and a calm collected demeanor that I could see how people would want to work with him .

Regarding what Account Closed said, it can be difficult for college students to stay motivated over video lectures, versus in-person classes.

You can't trust anyone to help you across the board out of state, you have to have very strong oversight and know how to hold people accountable from afar with video updates and workflow requirements.

His videos gave me a basic understanding of how to invest, but I kept thinking, there's no way people can buy houses for 40- and 50-thousand dollars. 

There are helpful youtube videos but it is a tedious operation.

Check out this video about taking consistent action over the long term.  

Surprisingly my realtor and property manager (Keith Jourdan) gave me the best quote and also gave me in depth video walkthroughs of the rehab needed.