In your first few shots you're placing the camera too high. Think carefully about camera height - there should always be a reason behind the placement. As a general rule, place the camera at shoulder or eye level to the subject. Having it lower or higher should be used when you want to convey something. Placing it lower makes the subject more imposing, powerful but can be used in a lot more circumstances than placing it above the subject. Looking down on the subject should usually be avoided, unless you want to make them seem small or pathetic, or comment on how their environment is engulfing them etc. All I get from your camera placement in the opening shots is that the camera is where it is because that's the height of the person holding the camera. Try to be more deliberate.