Let’s break down your exact keyword phrase, because understanding the jargon will keep you safe.
So, you are looking for a high-quality, stream-ripped version of a French art film, at no cost. While the desire is understandable (art-house films can be hard to find), the method carries significant risk.
The obsession with "WebDL" over other formats is about quality. But here is the truth: Lady Chatterley (2006) was shot on 35mm film. Its visual texture—the grain, the soft focus of the forest, the muted greens and browns—is actually better preserved on a standard Blu-ray (which can be ripped to a 10-15 GB MKV file) than on a heavily compressed WebDL.
A true WebDL from a service like Amazon may be in HEVC (x265) and look good, but a well-encoded 720p or 1080p scene release from a private tracker is ethically problematic. Instead, aim for a legal digital purchase which typically offers identical or superior quality to a WebDL.
Before discussing how to download the film, you must understand why this version demands your attention.