Hello,
Regarding you video sharing problems, you have to remember that you definitely need to have a call (audio/video) in progress for these features to properly work
![;)](images/smilies/msn_wink.gif)
If that wasn't the issue, giving us some extra info would greatly help us find what might be wrong.
Info like your system specs, for example:
What version of Skype are you running?
What is your Operating System?
What is your current video card?
Now regarding your P.S. note:
Not being able to share a local video file without a video call in progress seems to be a normal thing. Who would you be sharing it with if you are not in a video call? Now, If you need to preview it, simply use your local media player for that end.
Sharing emotions/winks/sounds work a bit differently though, mainly because we can also share them through a regular chat conversation in which there is no need for a video display. So that's mainly why the local video sharing feature only works with a call in progress.
Thanx for taking the time and posting in the forums!