When I upload videos from my digital camera, I have the option of viewing the videos in Windows Media Player, but when I do, the video only plays the sound? Is there a way to convert it in windows media player, so I can see the videos? I want to be able to send the videos to my friends.

You may try this video tool E.M. Total Video Converter, I always use it to convert video to wma
it supports all video and audio formats including AVI, WMV, MP4, MPEG, FLV, MOV, MKV, VOB, MP3, 3GP, etc. You can also use it to trim, crop, join videos, even add a logo to a video, if you are interested in it,you can down it from herehttp://www.google.com/search?hl=en&newwi…
it depends on what format your videos are in on your digital camera, mine are in avi format, so they play just fine in WMP
you must download quicktime player to see it