diff --git a/utils/datasets.py b/utils/datasets.py
index 331092d..65e642d 100755
--- a/utils/datasets.py
+++ b/utils/datasets.py
@@ -18,7 +18,7 @@ from utils.utils import xyxy2xywh, xywh2xyxy
 
 help_url = 'https://github.com/ultralytics/yolov5/wiki/Train-Custom-Data'
 img_formats = ['.bmp', '.jpg', '.jpeg', '.png', '.tif', '.dng']
-vid_formats = ['.mov', '.avi', '.mp4', '.mpg']
+vid_formats = ['.mov', '.avi', '.mp4', '.mpg', '.mpeg', '.m4v', '.wmv', '.mkv']
 
 # Get orientation exif tag
 for orientation in ExifTags.TAGS.keys():
@@ -63,7 +63,8 @@ class LoadImages:  # for inference
             self.new_video(videos[0])  # new video
         else:
             self.cap = None
-        assert self.nF > 0, 'No images or videos found in ' + path
+        assert self.nF > 0, 'No images or videos found in %s. Supported formats are:\nimages: %s\nvideos: %s' % \
+                            (path, img_formats, vid_formats)
 
     def __iter__(self):
         self.count = 0