As a first time doing reviews in this format a lot of the messing around is excused and even welcome to break the ice a little. Once the group gets into the meat of the reviews it seems like nobody really understands what they're supposed to point out though. I'd recommend writing up a bunch of base...
As Mirko stated it is impossible to retain optimal quality when zooming in. However there are certain ways of masking this via things like motion/radial blurs. These solutions only work for quick zoom cut/transitions though. If you are looking to zoom in on a piece of footage and keep it zoomed in, ...
While I don't personally use vegas that would be a combination of "Pan and scan" [moving one image above the screen and another into the screen from the bottom] and directional blur set at a vertical angle to fake motion-blur. I obviously can't record this for you since I don't have vegas installed ...