Hey,
It either looks like you'r project and timeline settings are setup incorrectly or you've got got the feild blending options setup wrong.
Make sure that your project setting is set to NTSC, that is the video format for the USA, also make sure that your project is set to whatever frame rate you are filming at, so if your filming at 24p you want your project to be the same, if your shooting at 60i you want your project to be 60i aswell.
That also goes for rendering!
Make sure you render to a nice format, if your using something like MP4 99% of the time it is'nt a pleasing result, longer rendering time usually mean better results, you just have to be patient.
Also, its seems to look echoey? this could be due to the frame blending settings, in sony vegas there are two options, one of them is to interpolate, and the other to blend!
Have a look at which one works best with the format that your dslr films with.
I hope ive helped you out!
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