What are the export settings? What version of VP is being used? Try version 845 . For licensed users upgrades are free for up to six months from purchase date. After that, VP will continue to fully function but a fee will be required in order to register the newest. Retain your old install file and registration info.
At 1:15 in your #7 isn't blurry, it's bizarre. Unable to replicate your result. When your project is exported at default mp4, H264, 1080 settings in version 8.45 it looks fine. The only fault spotted was a slight flicker in the pull-out shot at 1:50.
If the issue persists, try exporting in AVI format, using the MPEG4 compressor.