[FEATURE] best_video_quality prebuilt preset (#526)

* [FEATURE] best_video_quality prebuilt preset

* common

docs/presets.rst

@@ -127,3 +127,16 @@ one or more season presets, with the following override variables:
        # tv_show_genre: "ytdl-sub"
        # episode_title: "{upload_date_standardized} - {title}"
        # episode_description: "{webpage_url}"
+
+Common
+------
+
+Common presets are applicable to any config.
+
+Best Video Quality
+^^^^^^^^^^^^^^^^^^
+
+Add the following preset to download the best available video and audio quality, and remux
+it into an MP4 container:
+
+* ``best_video_quality``

src/ytdl_sub/prebuilt_presets/helpers/common.yaml

@@ -0,0 +1,9 @@
+
+
+presets:
+
+  best_video_quality:
+    ytdl_options:
+      format: "bestvideo+bestaudio/best"
+      merge_output_format: "mp4"
+      remux_video: "mp4"