diff --git a/autopyvideothumbnailer b/autopyvideothumbnailer
index 67bc3df..3c8a30f 100755
--- a/autopyvideothumbnailer
+++ b/autopyvideothumbnailer
@@ -7,21 +7,24 @@ import math
 import os
 import subprocess
 import click
+import mimetypes
 
+
+from addict import Dict
 from pymediainfo import MediaInfo
 
 
-VERBOSE = False
+def is_video_file(video_file_path):
+    type_ = mimetypes.guess_type(video_file_path)[0]
+    return type_ is not None and type_.startswith("video/")
 
-def is_video_file(video_file_path, video_extensions):
-    return video_file_path.lower().endswith(tuple(video_extensions))
 
-def find_video_files(directory, video_extensions):
+def find_video_files(directory):
     # Recursively walk through directory
     for dirpath, dirs, files in os.walk(directory):
         for filename in files:
             filename_path = os.path.join(dirpath, filename)
-            if is_video_file(filename_path, video_extensions):
+            if is_video_file(filename_path):
                 yield os.path.abspath(filename_path)
 
 
@@ -42,60 +45,77 @@ def get_video_duration(video_file_path):
     return None
 
 
-def call_thumbnailer(video_file, width, rows, *, skip_seconds=10):
+def call_thumbnailer(video_file, width, columns, rows, *, skip_seconds=10):
     # Call external thumbnailer program
     subprocess.run(
         [
             "pyvideothumbnailer",
             "--width",
             str(width),
+            "--columns",
+            str(columns),
             "--rows",
             str(rows),
             "--jpeg-quality",
             str(90),
+            "--header-font",
+            config.font,
             "--skip-seconds",
             str(skip_seconds),
             video_file,
         ]
     )
 
+
 def process(searchdir):
-    VIDEO_FILE_EXT = [".mp4", ".mkv", ".avi", ".mov", ".wmv"]
-    video_files = find_video_files(searchdir, VIDEO_FILE_EXT)
+    video_files = find_video_files(searchdir)
 
     for video_file in video_files:
         # Skip if .jpg file already exists
         thumbnails_file = video_file + ".jpg"
         if os.path.exists(thumbnails_file):
-            if VERBOSE:
+            if config.verbose:
                 print(f"Skipping: {video_file} (thumbnails already exist)")
             continue
 
         try:
             duration = get_video_duration(video_file)
             if duration is not None:
-                # Calculate rows
-                COLS = 4  # pyvideothumbnailer default
-                EVERY = 5 * 60  # seconds
-                rows = math.ceil(duration / EVERY / COLS)
+                rows = math.ceil(duration / config.every / config.columns)
 
                 skip_seconds = 10
                 if duration < 60:
                     skip_seconds = 0
 
                 # Call the thumbnailer
-                WIDTH = 1600
-                call_thumbnailer(video_file, WIDTH, rows, skip_seconds=skip_seconds)
+                call_thumbnailer(
+                    video_file,
+                    config.width,
+                    config.columns,
+                    rows,
+                    skip_seconds=skip_seconds,
+                )
         except (TypeError, UnicodeEncodeError, FileNotFoundError) as e:
             print(f"Error for {video_file}: {e}")
 
 
+config = Dict()
+
+
 @click.command()
-@click.argument('searchdirs', nargs=-1)
-def main(searchdirs):
+@click.argument("searchdirs", nargs=-1)
+@click.option("-v", "--verbose", is_flag=True, default=False)
+def main(searchdirs, verbose):
     """Run pyvideothumbnailer for every video file found"""
+
+    config.verbose = verbose
+    config.width = 1600
+    config.columns = 4  # pyvideothumbnailer default
+    config.every = 5 * 60  # seconds
+    config.font = "DejaVuSansMono.ttf"
+
     if not searchdirs:
-        searchdirs=["."]
+        searchdirs = ["."]
     for searchdir in searchdirs:
         process(searchdir)