Even if you want to see it,you can't see it any more.

这句话是口语的表达。意思是“机会已经错过了，你要是想看也看不到了。”最后一个“你”有点埋怨、鄙视的意思。比如说，”得了吧你“、“干什么呢你‘

I think the last 你 appears to have no meaning. It is usually used in spoken Chinese.

U will never see it again even u want to see it.

你想看都看不着了你=你想看都看不着了，最后的那个你属于方言里面加强语气的，没有特别的意思，书面上也不这样用，口语用法