I'm not sure what you mean by front on, Because you wouldn't want to shoot people front on it would be breaking the "rule of thirds",
anyway your stuff looks good, I just would suggest working with the lighting a little more in each scene avoid dull, bland colors especially grey's, keep more positive color's also if you have the time you can color grade a bit to make it stand out tho for doco's I could see much point.
Also I noticed with one of the videos you had allot of the people dead on, try putting them really slightly in on direction, people dont like the look of things strait on, also some shots were out of focus, but otherwise I really think you had some nice looking, great shot's. Just keep at it. you only learn through mistakes.
Read this:
http://en.wikipedia.org/wiki/Rule_of_thirds
Ps. your lens can make a difference to your picture quality