And it over heats when driving. Fan kicks on when I turn the air on, haven' noticed if it does when driving, but remember, I had no overheating issues until the flush. Included is a couple pictures of where I believe the leak is coming from

 

Ok since it did start blowing hot air it probably purged the heater core properly and you just need to refill the radiator now that it's missing about 1/2 gallon of fluid. Fix the leak so the system holds pressure and you should be good to go. I would run the heater on high again from a cold start to keep the flow valve completely open through the heat cycle to remove any bubbles still in the system.

 

The embedded video doesn't play for me, upload to youtube and post a link here.

 

They aren't videos. Just screenshot of a video I took. I could do that but the whole video is just giving context to where that is (pointing out radiator, pulley belts etc)