With the floating preview pane the videos are only played
when I assing the extension to the "Windows Media Player Rich Preview Handler" as explained above.
Without this XY only show a large image which is the same as Windows Explorer preview does in this case.
In the XY preview tab the videos are previewed directly as long as I don't make the assigment to Windows Media Player Rich Preview Handler.
If such an assignment is made XY displays a WMP screen in which I can start playing.
I made this assigments only for testing purposes.
Normaly I use the Direct Show playing in XY and also in TC.