diff --git a/brozzler/worker.py b/brozzler/worker.py
index 7a7a246..e691f83 100644
--- a/brozzler/worker.py
+++ b/brozzler/worker.py
@@ -180,6 +180,10 @@ class BrozzlerWorker:
             "nopart": True,
             "no_color": True,
             "progress_hooks": [ydl_progress],
+             # https://github.com/rg3/youtube-dl/blob/master/README.md#format-selection
+             # "best: Select the best quality format represented by a single
+             # file with video and audio."
+            "format": "best/bestvideo+bestaudio",
         }
         if self._proxy_for(site):
             ydl_opts["proxy"] = "http://{}".format(self._proxy_for(site))
diff --git a/setup.py b/setup.py
index 8d2f6f2..4c04e32 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@ def find_package_data(package):
 
 setuptools.setup(
         name='brozzler',
-        version='1.1b12.dev259',
+        version='1.1b12.dev260',
         description='Distributed web crawling with browsers',
         url='https://github.com/internetarchive/brozzler',
         author='Noah Levitt',