The where you can watch it legally.

720p HEVC WEB-DL Container: MKV/MP4 Video: HEVC (x265), ~1–2 Mbps Audio: AAC 2.0 / 5.1 (depending on source) Source: WEB-DL (streaming platform)

If you already own the DVD or Blu-ray of a movie, you can rip it yourself.

WebDLs are extracted by breaking the encryption on services like Netflix or Amazon Prime. Distributing or downloading them is illegal in most jurisdictions (US, EU, UK, Japan). Your ISP can see you accessing known torrent hash lists. Fines for downloading a single WebDL can range from $750 to $150,000 per work in the US.