you know what. i think that was the final step i just missed. funny because i was following the guide on the mythtv site.
thanks for helping me out guys.
for those following along:
i unmounted the path, it had me run "sudo e2fsck -f /dev/VGforMyth/video" first, then i ran "sudo resize2fs -p /dev/VGforMyth/video", then remounted it to /home/nick/video
it now shows up as 194.4GB under the file browser, which i guess is right even though VGforMyth shows up as 208.31GB?
thanks again...