The Tim Tracker has some of the best followed closely by Dis Unplugged. The Tim Tracker on youtube does everything from soup to nuts but more off the cuff. Dis Unplugged has awesome ( more organized ) podcasts, Best and Worst lists, top 5s, food reviews etc. IMO, both are great for travel planning or if your just missing the Happiest Place on Earth.
I like watching The Tim Tracker for daily videos, Adam Hattan has some great videos from his trips and i follow livingbydisney on Instagram - don't think she has a youtube page but her website is livingbydisney.com
The Tim Tracker is my favorite Disney related follow. I enjoy the DIS but wish they had a separate channel for Disneyland material. I understand that isn't a good business model as they obviously get more subscribers if they offer content for both parks but that's still my issue.
A great Disney channel for families is The Neverland Family. She gives a lot of resort tips which you don't see in a lot of other channels. Plus, great tips for families.