I would like to recommend a couple really good aviation YouTube Channels 

The first is Information Zulu this channel has Flight Sims, Flight videos and a 24/7 LIVE Sim of LAX Airport with Real ATC and Real Traffic Data as it happens in Real Time.   You can check it out below




The second channel is Airline Videos   This Channel Features Live Video Streams and Videos from LAX shot from various locations around LAX like Imperial Hill and In and Out Burger.  Features multi cam streams and have recently started doing live streams from other airports like San Francisco, San Diego, Las Vegas and Phoenix with more to come in the future.  Has a live stream almost every day.  You can check out a couple of videos below