Viddler

Be careful not to use "filler" words like ummmm.

Good introduction, but be careful not to repeat the same information too many times.

Here you are repeating information you have already given.

"or something like that" is a phrase that can lower your credibility with the audience. Try to always be concrete, and if you don't know something for sure, then leave it out.

Your gestures so far have been very apropriate, but watch out for movements that are too exaggerated like this one.

Be careful of humor when it is about culturally relative subjects like age. In many cultures remarks about being old are considered very offensive (like the U.S.) even if it is a joke in good faith.

You are at the time limit! This is the 4 minute mark.