docs: correct DRM, muxing, and proxy references (+ case-insensitive proxy prefix fix)

docs/guide/drm-and-cdm.md

@@ -71,8 +71,8 @@ The differences that matter to you are:
   [Widevine and PlayReady on the same title](#widevine-and-playready-on-the-same-title)).
 
 To download a Widevine-protected title you need a `.wvd` device; for PlayReady you
-need a `.prd` device. You can hold both and let unshackle choose, or force one with
-the `--drm` flag.
+need a `.prd` device. You can hold both, and unshackle automatically selects the
+appropriate one for each track.
 
 !!! info "Obtaining device files"
     A `.wvd` or `.prd` encodes the private keys of a real client device. unshackle
@@ -205,12 +205,7 @@ cdm:
   EXAMPLE2: sm_g935f_l1
 ```
 
-Lookups are case-insensitive. On the command line you can override the configured
-device for a single run:
-
-```console
-$ unshackle dl -w chromecdm_l3 EXAMPLE1 B0ABCDEF
-```
+Lookups are case-insensitive.
 
 !!! tip "The device name is the file name"
     A device named `chromecdm_l3` in the config resolves to `chromecdm_l3.wvd` in the
@@ -238,8 +233,9 @@ profile.
 
 === "By DRM system"
 
-    Keys `widevine` and `playready` select a device per system. This pairs with the
-    `--drm` flag, which accepts `wv`/`widevine` or `pr`/`playready`.
+    Keys `widevine` and `playready` select a device per system. unshackle applies
+    these automatically, using the `widevine` device for Widevine tracks and the
+    `playready` device for PlayReady tracks.
 
     ```yaml
     cdm:
@@ -471,8 +467,8 @@ Title needs a Widevine CDM but SOMESERVICE is configured with PlayReady.
 ```
 
 Use the `cdm` mapping's [DRM-based selection](#advanced-selection-by-quality-drm-or-profile)
-to configure a device for each system, or force one system with `--drm` on the
-command line.
+to configure a device for each system; unshackle selects the right one per track
+automatically.
 
 ## Keys, vaults, and caching
 

docs/guide/output-and-naming.md

@@ -13,7 +13,7 @@ When a download finishes muxing, unshackle builds the final path from three piec
 ```
 
 - **Output directory**: `directories.downloads` from your config, or whatever you pass to `-o/--output` on the command line for a single run.
-- **Folder template**: an optional per-title subfolder. TV episodes and music tracks are **always** placed in a folder; movies only get one if you define a `movies` folder template (see [Folder templates](#folder-templates)).
+- **Folder template**: an optional per-title subfolder. TV episodes and music tracks are **always** placed in a folder; movies only get one if you define a `movies` folder template, or a single-string `folder` template that applies to all title kinds (see [Folder templates](#folder-templates)).
 - **Filename template**: the `output_template` for the title kind (movie, series, or song).
 - **Extension**: chosen by the muxer: `.mkv` for video, `.mka` for audio-only, `.mks` for subtitle-only.
 
@@ -188,10 +188,10 @@ The per-kind folder keys are `movies`, `series`, `songs`, and `albums`. Any othe
 **Fallback behavior:**
 
 - A per-kind folder template wins if present; otherwise the single `folder` string is used; otherwise unshackle falls back to a built-in default.
-- Built-in defaults when no folder template is set: movies get no folder at all unless a `movies` folder template exists; series fall back to a folder *derived* from the `series` output template (stripping `{episode}`, `{episode_name}`, and collapsing `{season_episode}` down to `{season}`); music albums fall back to `{artist} - {album} ({year})`.
+- Built-in defaults when no folder template is set: movies get no folder at all unless a `movies` folder template (or a single-string `folder` template) exists; series fall back to a folder *derived* from the `series` output template (stripping `{episode}`, `{episode_name}`, and collapsing `{season_episode}` down to `{season}`); music albums fall back to `{artist} - {album} ({year})`.
 
 !!! note "Movies are flat by default"
-    Episodes and songs are always foldered. Movies are written directly into the output directory *unless* you define a `movies` folder template. Set one if you want each movie in its own directory.
+    Episodes and songs are always foldered. Movies are written directly into the output directory *unless* you define a `movies` folder template (or a single-string `folder` template, which folders every kind). Set one if you want each movie in its own directory.
 
 ## Muxing options
 
@@ -200,7 +200,7 @@ Muxing (combining video, audio, subtitle, chapter and attachment tracks into a s
 ```yaml title="unshackle.yaml"
 muxing:
   set_title: true
-  merge_video: true
+  merge_video: false
   merge_audio: true
   default_language:
     audio: en
@@ -210,7 +210,7 @@ muxing:
 | Key | Type | Default | Effect |
 |---|---|---|---|
 | `set_title` | bool | `true` | Write the title name into the MKV container title with `--title`. Set to `false` to omit it. |
-| `merge_video` | bool | `true` | Group video tracks that share the same resolution, range, and codec into one file so only language varies inside it. |
+| `merge_video` | bool | `false` | Group video tracks that share the same resolution, range, and codec into one file so only language varies inside it. |
 | `merge_audio` | bool | `true` | Merge audio tracks of the same kind so multiple languages sit in one file. |
 | `default_language` | map | *(unset)* | Preferred language per track type (`video` / `audio` / `subtitle`). A track in the preferred language is flagged as the default track. |
 

docs/guide/proxies-and-vpn.md

@@ -418,7 +418,7 @@ proxy_providers:
 ```
 
 **Required keys:** `username`, `password`. unshackle validates them up front: the
-combined username and password must be exactly 48 lowercase alphanumeric characters, and
+combined username and password must be exactly 48 alphanumeric characters (case-insensitive), and
 the username must not contain an `@`. If validation fails, you have almost certainly used
 your login credentials instead of your service credentials.
 
@@ -555,7 +555,7 @@ proxy_providers:
 ```
 
 **Required keys:** `username`, `password`, validated with the same 48-character rule as
-NordVPN (combined username+password must be 48 lowercase alphanumeric characters, no `@`).
+NordVPN (combined username+password must be 48 alphanumeric characters, case-insensitive, no `@`).
 `server_map` optionally pins server IDs per region.
 
 **Query forms:**

unshackle/commands/dl.py

@@ -1104,7 +1104,11 @@ class dl:
                     with console.status(status_msg, spinner="dots"):
                         if requested_provider:
                             proxy_provider = next(
-                                (x for x in self.proxy_providers if x.__class__.__name__.lower() == requested_provider),
+                                (
+                                    x
+                                    for x in self.proxy_providers
+                                    if x.__class__.__name__.lower() == requested_provider.lower()
+                                ),
                                 None,
                             )
                             if not proxy_provider: