diff --git a/youtube_dl/extractor/dvtv.py b/youtube_dl/extractor/dvtv.py
index a52bb3469..af552831c 100644
--- a/youtube_dl/extractor/dvtv.py
+++ b/youtube_dl/extractor/dvtv.py
@@ -2,62 +2,62 @@
 
 from __future__ import unicode_literals
 
-import re
-import json
 from .common import InfoExtractor
 from ..utils import (
-	ExtractorError,
-	js_to_json,
-	unescapeHTML
+    js_to_json,
+    unescapeHTML
 )
 
 
 class DVTVIE(InfoExtractor):
-	IE_NAME = 'dvtv'
-	IE_DESC = 'http://video.aktualne.cz/dvtv/'
-
-	_VALID_URL = r'http://video\.aktualne\.cz/dvtv/(?P<id>[a-z0-9-]+/r~[0-9a-f]{32})/?'
-
-	_TESTS = [{
-		'url': 'http://video.aktualne.cz/dvtv/vondra-o-ceskem-stoleti-pri-pohledu-na-havla-mi-bylo-trapne/r~e5efe9ca855511e4833a0025900fea04/',
-		'md5': '75800f964fa0f82939a2914563301f72',
-		'info_dict': {
-			'id': 'e5efe9ca855511e4833a0025900fea04',
-			'ext': 'webm',
-			'title': 'Vondra o Českém století: Při pohledu na Havla mi bylo trapně'
-		}
-	}, {
-		'url': 'http://video.aktualne.cz/dvtv/stropnicky-policie-vrbetice-preventivne-nekontrolovala/r~82ed4322849211e4a10c0025900fea04/',
-		'md5': 'd50455195a67a94c57f931360cc68a1b',
-		'info_dict': {
-			'id': '82ed4322849211e4a10c0025900fea04',
-			'ext': 'webm',
-			'title': 'Stropnický: Policie Vrbětice preventivně nekontrolovala'
-		}
-	}]
-
-	def _real_extract(self, url):
-		video_id = self._match_id(url)
-		webpage = self._download_webpage(url, video_id)
-
-		code = self._search_regex(r'embedData[0-9a-f]{32}\[\'asset\'\] = (\{.+?\});', webpage, 'video JSON', flags=re.DOTALL)
-		payload = self._parse_json(code, video_id, transform_source=js_to_json)
-		formats = []
-		for source in payload['sources']:
-			formats.append({
-				'url': source['file'],
-				'ext': source['type'][6:],
-				'format': '%s %s' % (source['type'][6:], source['label']),
-				'format_id': '%s-%s' % (source['type'][6:], source['label']),
-				'resolution': source['label'],
-				'fps': 25,
-				'preference': -1 if source['type'][6:] == 'mp4' and source['label'] == '720p' else -2
-			})
-
-		return {
-			'id': video_id[-32:],
-			'display_id': video_id[:-35],
-			'title': unescapeHTML(payload['title']),
-			'thumbnail': 'http:%s' % payload['image'],
-			'formats': formats
-		}
+    IE_NAME = 'dvtv'
+    IE_DESC = 'http://video.aktualne.cz/dvtv/'
+
+    _VALID_URL = r'http://video\.aktualne\.cz/dvtv/(?P<id>[a-z0-9-]+/r~[0-9a-f]{32})/?'
+
+    _TESTS = [{
+        'url': 'http://video.aktualne.cz/dvtv/vondra-o-ceskem-stoleti-pri-pohledu-na-havla-mi-bylo-trapne/r~e5efe9ca855511e4833a0025900fea04/',
+        'md5': '75800f964fa0f82939a2914563301f72',
+        'info_dict': {
+            'id': 'e5efe9ca855511e4833a0025900fea04',
+            'ext': 'webm',
+            'title': 'Vondra o Českém století: Při pohledu na Havla mi bylo trapně'
+        }
+    }, {
+        'url': 'http://video.aktualne.cz/dvtv/stropnicky-policie-vrbetice-preventivne-nekontrolovala/r~82ed4322849211e4a10c0025900fea04/',
+        'md5': '6388f1941b48537dbd28791f712af8bf',
+        'info_dict': {
+            'id': '82ed4322849211e4a10c0025900fea04',
+            'ext': 'mp4',
+            'title': 'Stropnický: Policie Vrbětice preventivně nekontrolovala'
+        }
+    }]
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+        webpage = self._download_webpage(url, video_id)
+
+        code = self._search_regex(
+            r'(?s)embedData[0-9a-f]{32}\[\'asset\'\] = (\{.+?\});',
+            webpage, 'video JSON')
+        payload = self._parse_json(code, video_id, transform_source=js_to_json)
+        formats = []
+        for source in payload['sources']:
+            ext = source['type'][6:]
+            formats.append({
+                'url': source['file'],
+                'ext': ext,
+                'format': '%s %s' % (ext, source['label']),
+                'format_id': '%s-%s' % (ext, source['label']),
+                'height': int(source['label'].rstrip('p')),
+                'fps': 25,
+            })
+        self._sort_formats(formats)
+
+        return {
+            'id': video_id[-32:],
+            'display_id': video_id[:-35],
+            'title': unescapeHTML(payload['title']),
+            'thumbnail': 'http:%s' % payload['image'],
+            'formats': formats
+        }