PCManFM doesn't get partially transparent. But mtPaint does, for example. It is even more weird. When the browser is minimalized, and the terminal or mtPaint not, then I can watch the video!! Right through some parts of their windows.
Because a screenshot does not catch it, I would suspect the drivers or some hardware things. I don't know how exactly screenshots are taken, but I guess it is done via software that gets info from the OS or from the desktop environment. That would indeed mean that these issues are not chaught by a screenshot, just because it could be caused by the driver or hardware.
Does this sound plausible?
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