diff --git a/.gitignore b/.gitignore
index d18f225..da73d48 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ pom.xml.asc
 /.nrepl-port
 .hgignore
 .hg/
+videos/
diff --git a/CHANGELOG.md b/CHANGELOG.md
deleted file mode 100644
index 275e7b3..0000000
--- a/CHANGELOG.md
+++ /dev/null
@@ -1,24 +0,0 @@
-# Change Log
-All notable changes to this project will be documented in this file. This change log follows the conventions of [keepachangelog.com](http://keepachangelog.com/).
-
-## [Unreleased]
-### Changed
-- Add a new arity to `make-widget-async` to provide a different widget shape.
-
-## [0.1.1] - 2020-07-13
-### Changed
-- Documentation on how to make the widgets.
-
-### Removed
-- `make-widget-sync` - we're all async, all the time.
-
-### Fixed
-- Fixed widget maker to keep working when daylight savings switches over.
-
-## 0.1.0 - 2020-07-13
-### Added
-- Files from the new template.
-- Widget maker public API - `make-widget-sync`.
-
-[Unreleased]: https://github.com/your-name/video-optimize/compare/0.1.1...HEAD
-[0.1.1]: https://github.com/your-name/video-optimize/compare/0.1.0...0.1.1
diff --git a/README.md b/README.md
index 8e6a150..686cd2f 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,32 @@
-# video-optimize
+# Usage
 
-## Usage
+1) Create `config.yaml`.
 
 ``` bash
-java $JVM_OPTS -cp deploy.jar clojure.main -m video-optimize.core
+extension_thumbnail: "_thumbnail.mp4"
+width_thumbnail: 600
+path_videos: "videos"
 ```
+
+2) Make folder `path_videos`.
+
+``` bash
+mkdir videos
+```
+
+3) Install `ffmpeg`.
+
+4) Download the latest version (`video-optimize-{version}-standalone.jar`).
+
+https://github.com/tanrax/auto-video-thumbnail/releases
+
+
+5) Now you can execute.
+
+``` bash
+java $JVM_OPTS -cp video-optimize-{version}-standalone.jar clojure.main -m video-optimize.core
+```
+
+6) Leave videos.
+
+Everything you leave in the videos folder will be optimized for web with the specified resolution (600 px in this example).
diff --git a/config.yaml b/config.yaml
new file mode 100644
index 0000000..d288596
--- /dev/null
+++ b/config.yaml
@@ -0,0 +1,3 @@
+extension_thumbnail: "_thumbnail.mp4"
+width_thumbnail: 600
+path_videos: "videos"
diff --git a/doc/intro.md b/doc/intro.md
deleted file mode 100644
index be2338f..0000000
--- a/doc/intro.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# Introduction to video-optimize
-
-TODO: write [great documentation](http://jacobian.org/writing/what-to-write/)
diff --git a/project.clj b/project.clj
index d7e7b6f..d06813f 100644
--- a/project.clj
+++ b/project.clj
@@ -4,7 +4,10 @@
   :license {:name "EPL-2.0 OR GPL-2.0-or-later WITH Classpath-exception-2.0"
             :url  "https://www.eclipse.org/legal/epl-2.0/"}
   :dependencies [[org.clojure/clojure "1.10.1"]
-                 [hawk "0.2.11"]]
+                 ;; Watcher
+                 [hawk "0.2.11"]
+                 ;; Yaml
+                 [clj-yaml "0.4.0"]]
   :main ^:skip-aot video-optimize.core
   :aot  [video-optimize.core]
   :repl-options {:init-ns video-optimize.core})
diff --git a/src/video_optimize/core.clj b/src/video_optimize/core.clj
index 1932983..865b277 100644
--- a/src/video_optimize/core.clj
+++ b/src/video_optimize/core.clj
@@ -2,25 +2,29 @@
   (:require
    [clojure.java.io :as io]
    [clojure.string :as str]
+   [clj-yaml.core :as yaml]
    [hawk.core :as hawk]
    [clojure.java.shell :as shell]))
 
-(def EXTENSION_THUMBNAIL "_thumbnail.mp4")
-(def PATH_VIDEOS "videos")
+;; VARIABLES
+(def config (yaml/parse-string (slurp "config.yaml")))
+(def extension_thumbnail (:extension_thumbnail config))
+(def width_thumbnail (:width_thumbnail config))
+(def path_videos (:path_videos config))
 
 (defn -main [& args]
   ;; Watch
-  (hawk/watch! [{:paths   [PATH_VIDEOS]
+  (hawk/watch! [{:paths   [path_videos]
                  :handler (fn [ctx e]
                             (let [path_raw       (.getAbsolutePath (:file e))
-                                  is_thumbnail   (doall (re-find (re-pattern EXTENSION_THUMBNAIL) path_raw))
-                                  path_thumbnail (str/join (concat (drop-last (str/split path_raw #"\.")) EXTENSION_THUMBNAIL))]
+                                  is_thumbnail   (doall (re-find (re-pattern extension_thumbnail) path_raw))
+                                  path_thumbnail (str/join (concat (drop-last (str/split path_raw #"\.")) extension_thumbnail))]
                               (if (and (.exists (io/file path_raw)) (not is_thumbnail) (not (.exists (io/file path_thumbnail))))
                                 (do
                                   (prn (str "Optimizing: " path_raw))
-                                        ; Optimizing with ffmpeg
-                                  (shell/sh "ffmpeg" "-y" "-i" path_raw "-vf" "scale=600:-2" "-c:v" "libx264" "-crf" "23" "-profile:v" "high" "-pix_fmt" "yuv420p" "-color_primaries" "1" "-color_trc" "1" "-colorspace" "1" "-movflags" "+faststart" "-an" "-acodec" "aac" "-ab" "128kb" path_thumbnail)
+                                  ;; Optimizing with ffmpeg
+                                  (shell/sh "ffmpeg" "-y" "-i" path_raw "-vf" (str "scale=" width_thumbnail ":-2") "-c:v" "libx264" "-crf" "23" "-profile:v" "high" "-pix_fmt" "yuv420p" "-color_primaries" "1" "-color_trc" "1" "-colorspace" "1" "-movflags" "+faststart" "-an" "-acodec" "aac" "-ab" "128kb" path_thumbnail)
                                   (prn (str "Finish: " path_thumbnail))))
                               )
                             )}])
-  (println "Run video converter"))
+  (println "Running: Feed me!"))