watch out for creating duplicate jit.windows on top of the ones that are already there. every time you click "II" you are doing this, and the scripting names automatically get array notation like "win21", "win21", etc., because they must be unique. So these will NOT connect to jit.qt.movie via scripting, because your script command doesn't specify "win21" etc. And your new windows will be created on top of the old ones, so it will seem like they're not playing back (and they shouldn't!). Use "border 1" so you can move them after creating them and you'll see what's happening.
Cool idea though, you just need to ensure that things are spaced apart from each other, so you can see the different layers. [sprintf] can help with specific script commands.
it is strange, i always get this error: jit.gl.texture: setting subteximage during submission: gl error: invalid operation, both on osx 10.06.08 with a 2 years old mbp 15 and a new win7 64 machine with the latest asus eyefinity 6 3gb graphics card. more strange if i have another patch running with different jit.windows at
the same time it seems to work, but i get the same error and a different jit.windows is kicked off