16.0a1 on my XP x64 box, here. 
Hey, will this run on MorphOS with the OS4 API emulator?
No, TW relies on shared objects and probably other things not implemented in os4emu.
On the other hand, i'm not sure why you would want it, except maybe to watch Youtube in slideshow mode (i can add that option in OWB if it's really an essential feature
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