Learning to Program with MATLAB:
Section references are to the Wiley textbook: Learning to Program with MATLAB: Building GUI Tools, Second edition
Videos on using appdesigner to make MATLAB GUI Tools.
NOTE: Videos can be helpfully played at faster-than-normal speed (1.25x, 1.5x, 1.75x, …) using the Player Settings on the lower right corner of the video player.
Legacy first edition videos are here.