diff --git a/README.md b/README.md
index c25b618..e3dd4f8 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,19 @@
 # Dynamic folders
 
 Collection of Bash scripts that execute functionalities in folders.
+
+## Video to mp4
+
+### Install
+
+### Run
+
+### Service
+
+## Development
+
+### Check syntax
+
+```sh
+shellcheck [script]
+```
diff --git a/dynamic-video-to-mp4.sh b/dynamic-video-to-mp4.sh
new file mode 100755
index 0000000..07eb30b
--- /dev/null
+++ b/dynamic-video-to-mp4.sh
@@ -0,0 +1,98 @@
+#!/usr/bin/env bash
+
+# --
+# Description: Script that watches when new videos are added to a folder and optimizes them to mp4 for Web.
+# --
+# Requirements: Install inotify-tools and ffmpeg
+# Example Debian: $sudo apt install inotify-tools ffmpeg
+# --
+# Activate a service
+# Cron: @reboot dynamic-video-to-mp4.sh >/dev/null 2>&1 &
+# or create a service:
+# $sudo nano /etc/systemd/system/dynamic-video-to-mp4.service
+# --
+
+# START
+set -e
+
+# VARIABLES
+PROGNAME=$(basename "$0")
+FOLDER_ORIGIN="$2"
+EXTENSIONS_TO_WATCH=("mkv" "mp4" "avi" "mov")
+
+# FUNCTIONS
+
+usage() {
+    if [ "$*" != "" ] ; then
+        echo "Error: $*"
+    fi
+
+    cat << EOF
+Usage: $PROGNAME [OPTION]
+Watches when new videos are added to a folder and optimizes them to mp4 for Web.
+Options:
+--folder [path]  Folder path where new video will be monitored and optimized
+--help           Display this usage message and exit
+EOF
+
+    exit 1
+}
+
+send-notification() {
+    if command -v notify-send >/dev/null 2>&1; then
+	# Send a native notification
+	notify-send "$1"
+    else
+	# If the above command is not available, print by console
+	echo "$1"
+    fi
+
+}
+
+start() {
+    # Monitors the selected folder
+    inotifywait -m -e create --format '%f' "$FOLDER_ORIGIN" |
+	while read -r filename; do
+	    # Gets the file extension
+	    extension="${filename##*.}"
+	    # Checks if the extension is in the extension list
+	    for ext in "${EXTENSIONS_TO_WATCH[@]}"; do
+		if [[ "$ext" = "$extension" ]]; then
+		    # Check if the file name starts with "optimized"
+		    if [[ "$filename" != optimized* ]]; then
+			# Notifies that the conversion is to be started
+			send-notification "Optimizing $filename ..."
+			# Convert the file to MP4 format using ffmpeg
+			ffmpeg -i "$FOLDER_ORIGIN/$filename" -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -nostdin -shortest "$FOLDER_ORIGIN/optimized_${filename%.*}.mp4"
+			# Notifies that it has been terminated
+			send-notification "Completed! Output: optimized_${filename%.*}.mp4"
+		    fi
+		fi
+	    done
+	done
+}
+
+# CONTROLE ARGUMENTS
+isArg=""
+
+while [ $# -gt 0 ] ; do
+    case "$1" in
+    --help)
+        usage
+        ;;
+    --folder)
+        isArg="1"
+	if [ $# -eq 2 ]; then
+	    start
+	else
+	    usage "You need to specify the path of the folder to watch."
+	fi
+        ;;
+    *)
+    esac
+    shift
+done
+
+if [ -z $isArg ] ; then
+    usage "Not enough arguments"
+fi
diff --git a/video-to-mp4.sh b/video-to-mp4.sh
deleted file mode 100644
index ae7fcf2..0000000
--- a/video-to-mp4.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/bin/bash
-
-# Requirements: sudo apt install inotify-tools ffmpeg
-# Enable, cron: @reboot /path/script.sh >/dev/null 2>&1 &
-# Carpeta de destino
-WATCH_FOLDER=$argv[1]
-
-# Extensiones a monitorear
-EXTENSIONS=("mkv" "mp4" "avi" "mov")
-
-# Configura inotify para monitorear la carpeta de destino
-inotifywait -m -e create --format '%f' "$WATCH_FOLDER" |
-while read filename; do
-    # Obtiene la extensión del archivo
-    extension="${filename##*.}"
-
-    # Verifica si la extensión está en la lista de extensiones
-    if [[ " ${EXTENSIONS[@]} " =~ " ${extension} " ]]; then
-        # Verifica si el nombre del archivo comienza con "optimized"
-        if [[ "$filename" != optimized* ]]; then
-	    notify-send "Archivo detectado: $filename. Iniciando conversión..."
-            # Convierte el archivo a formato MP4
-            ffmpeg -i "$WATCH_FOLDER/$filename" -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest "$WATCH_FOLDER/optimized_${filename%.*}.mp4"
-            notify-send "Archivo convertido: optimized_${filename%.*}.mp4"
-        else
-            echo "Archivo ignorado: $filename"
-        fi
-    fi
-done