December 31, 2010 1:13 PM

I'll answer your second question first since that's the easier one: if you're on your LAN, you're not using your bandwidth, so Comcast shouldn't "dock points" for that one.

As for sharing those videos, yes, you would be using up bandwidth for that one. Depending on the size of the video and the amount of times it's streamed, you may be using up a lot of bandwidth there. What I would recommend is uploading those larger video files to YouTube and making the videos private so only certain people can see them...that way you're not using up your bandwidth every time someone decides to view that video.