I had the same problem. When the costume is exposed to sunlight, red splotches appear, which seems to be an issue with this mod. So I can confirm that it is not your problem.
(I'm not an English speaker, so I used a translator, so please excuse any grammatical errors).
Yes, just create a folder inside of LML and name it "stream" no capitals, no nothing just stream, then place the ytd files inside of it and you should get it to work.
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and a great mod
When the costume is exposed to sunlight, red splotches appear, which seems to be an issue with this mod.
So I can confirm that it is not your problem.
(I'm not an English speaker, so I used a translator, so please excuse any grammatical errors).