I applaud you for sharing this with us not knowing what kind of comments u could get. *applause*
You are not bad for a beginner. I agree with Jolie and Puyo...I would add one more feedback. Need to use more facial expressions as if u are showing your feelings relating to the song. Like with singing songs using voices, the voices change pitch or tone to show the emotions of the song. Facial expressions is like the same thing for deaf people. 
Congrats on your first video. I dont have the guts! LOL!
