-file_re = re.compile(r"^\b([A-Za-z0-9_\-][A-Za-z0-9_\.\-/]*)\b$")
-img_re = re.compile(r"^.*\.(png|gif|jpg|jpeg|bmp|ico|ogm|ogg|mkv|mpg|mpeg|mp4|avi|asf|flv|wmv|qt)$", re.IGNORECASE)
-video_re = re.compile(r"^.*\.(ogm|ogg|mkv|mpg|mpeg|mp4|avi|asf|flv|wmv|qt)$", re.IGNORECASE)
-url_re = re.compile(r"^[a-z]{3,8}://[^\s'\"]+\S$")
-ext_re = re.compile(r"\.([^\./]+)$")
+file_re = re.compile(r"([A-Za-z0-9_\-][A-Za-z0-9_\.\-/]*)")
+url_re = re.compile(r"[a-z]{3,8}://[^\s'\"]+\S")
+ext_re = re.compile(r"\.([^\./]+)$")