I have one or two comments. I usually try to hold back, because I seem to have a talent for getting people's backs up, but as you're asking, here goes:
1) There is some (I would guess unintentional?) humour connected with Harry Potter's movements in bed. Either he should be wearing boxing gloves, or he should just lie there. Fully dressed...
2) There's a lot of set bumps/camera bumps and light flicker
3) Why does (Harry's mother?) come to the door, shout at him, and close the door again? In my (limited) experience of these situations, people either rush towards the car or stay shouting in the doorway. It all looks a bit inconsequential. Either she cares about him leaving (in which case, one of the above scenarios would apply), or she doesn't care, in which case she wouldn't have gone to the door in the first place.
Deeper, brighter colours are caused by the colour being more saturated. There are many ways of doing this -- you could start by looking at your webcam control software and see if you can adjust colour saturation in-camera.