The search for is understandable—the film’s notoriety precedes it. However, downloading it illegally is unnecessary and dangerous. For the price of a coffee, you can rent the uncut version from Apple TV or Amazon. You’ll get a clean file, stable playback, and most importantly, you won’t end up on a copyright infringement list.
To watch the film safely and legally, you should look toward reputable VOD (Video on Demand) platforms. Where to Watch Legally Download Human Centipede 2