We overlapped, got back on the first after spending 8 days in Orlando, 5 days at disney, and 1 at universal. Had a good time overall. Pandora at Animal Kindgom was incredible...I think Avatar Flight of Passage is the best ride in the parks, got to hit it twice.
I've been to a Disney a lot but we've never watched youtube stuff. For those planning, there are some great channels on youtube that are very helpful. I recommend allears.net (mainly WDW content) for anyone about to go. Its their job and they are in the parks daily. They go over all of the food, rides, new things like Genie+, have fresh content almost daily, etc. Its also entertaining, please check it out.
And if you are going to WDW, Steakhouse 71 is a must, get the cheeseburger. Space 220 is a cool concept, but wasn't worth the price point to me...the standby lounge would have been a better option but my wife waited until 4am to get reservations so we got the fixed menu.