Solfege is a system of attributing a syllable to each tone in a musical scale. Why learn solfege?
Getting to know the tones of the C Major Scale, for example, are best accomplished by becoming familiar with the voice of each tone. Can you recognize the familiar voice of a friend or loved one when they call on the phone? Of course you can. And with a little solfege training, when the C tone rings (or any other note in the scale), you will immediately recognize it like the voice of an old friend. Find the pattern of the C Major Scale on your uke by ear starting on the open 3rd string and let your ears guide you using the solfege.  The example in the video clip is in the key of Bb, however, the solfege pattern of each Major Scale is the same regardless of the key.