Bravo, Just checked the last link.
Like I said, you have the right ingredients. Your strong point are the lyrics and simple melody, simple but great.
Crazy Sunshine is up-tempo, you have to be careful that you don't shallow the words up and become inaudible. I do not know if you can do that song a wee bit slower, try it out.
Also, sometimes you don't seem to hit the note you are suppose to sing and goes flat, especially at the end of a verse when you have to sustain notes.
At the speed of Crazy S., it is not easy to sing in tune with constancy, it takes a trained singer or someone naturally has good vocal control. Then again, in your music genre I wonder if it is all that important. Dylan do not alway sang in tune too but he has a way of bending those notes with his voice.
Anyway, you appeared quite conscious of the surrounding and camera and not so concentrated in the performance. I know it is not easy with all those text/arrangement to remember. The 'ba la ba ba bab' part is a good hook and should be repeated, perhaps at the end after the slow part.
Another thing is that the guitar was not in tune.
Get a band together but with good musicians. With you ears I bet that your vocal control will improve as you listen to well tuned instruments.