I'm not aware of an instructional video for the exact simpletech drive you have. However, they are put together in similar ways, and I have linked a video on how to disassemble a similar model below.
The goal is to carefully removed the actual hard drive from the enclosure, so that you have the bare hard drive to connect to an external dock, or directly to a desktop computer.I believe you have a desktop size drive inside that enclosure, so I've linked an example picture of that below. If it happens to be a smaller notebook size drive, then it will look the same, but only smaller.
Once you remove the drive, you can use a USB docking station connected to any computer in order to access it. I've also put a link below to such a docking station you can purchase.
Removing the drive, and using a dock, should allow you to access this drive again, provided it is not damaged.
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