playlist_manager: Don't add non-public videos to playlists

So that playlists don't pick up unlisted videos.
When the video is modified to be public, it will be added as normal.

However, note that since playlist_manager never removes videos from playlists,
making an existing video public video unlisted will not remove it from playlists.

DATABASE.md

@@ -148,7 +148,7 @@ columns                    | type                                 | role
 `allow_holes`              | `BOOLEAN NOT NULL DEFAULT FALSE`     | edit input  | If false, any missing segments encountered while cutting will cause the cut to fail. Setting this to true should be done by an operator to indicate that holes are expected in this range. It is also the operator's responsibility to ensure that all allowed cutters have all segments that they can get, since there is no guarentee that only the cutter with the least missing segments will get the cut job.
 `uploader_whitelist`       | `TEXT[]`                             | edit input  | List of uploaders which are allowed to cut this entry, or NULL to indicate no restriction. This is useful if you are allowing holes and the amount of missing data differs between nodes (this shouldn't happen - this would mean replication is also failing), or if an operator is investigating a problem with a specific node.
 `upload_location`          | `TEXT`                               | edit input  | The upload location to upload the cut video to. This is used by the cutter, and must match one of the cutter's configured upload locations. If it does not, the cutter will not claim the event.
-`public`                   | `BOOLEAN NOT NULL DEFAULT TRUE`      | edit input  | Whether the uploaded video should be public or not, if the upload location supports that distinction. For example, on youtube, non-public videos are "unlisted".
+`public`                   | `BOOLEAN NOT NULL DEFAULT TRUE`      | edit input  | Whether the uploaded video should be public or not, if the upload location supports that distinction. For example, on youtube, non-public videos are "unlisted". It also controls whether the video will be added to playlists, only public videos are added to playlists.
 `video_ranges`             | `{start TIMESTAMP, end TIMESTAMP}[]` | edit input  | A non-zero number of start and end times, describing the ranges of video to cut. They will be cut back-to-back in the given order, with the transitions between as per `video_transitions`. If already set, used as the default range settings when editing.
 `video_transitions`        | `{type TEXT, duration INTERVAL}[]`   | edit input  | Defines how to transition between each range defined in `video_ranges`, and must be exactly the length of `video_ranges` minus 1. Each index in `video_transitions` defines the transition between the range with the same index in `video_ranges` and the next one. Transitions either specify a transition type as understood by `ffmpeg`'s `xfade` filter and a duration (amount of overlap), or can be NULL to indicate a hard cut.
 `video_title`              | `TEXT`                               | edit input  | The title of the video. If already set, used as the default title when editing instead of `description`.

playlist_manager/playlist_manager/main.py

@@ -78,7 +78,7 @@ class PlaylistManager(object):
 		videos = query(conn, """
 			SELECT video_id, tags, COALESCE((video_ranges[1]).start, event_start) AS start_time
 			FROM events
-			WHERE state = 'DONE' AND upload_location = ANY (%s)
+			WHERE state = 'DONE' AND upload_location = ANY (%s) AND public
 		""", self.upload_locations)
 		self.dbmanager.put_conn(conn)
 		return {video.video_id: video for video in videos}
@@ -296,6 +296,8 @@ def main(
 	upload_location_allowlist is a comma-seperated list of database upload locations to
 	consider as eligible to being added to playlists. For these locations, the database video id
 	must be a youtube video id.
+	Note that non-public videos will never be added to playlists, even if they have a matching
+	upload_location.
 
 	interval is how often to check for new videos, default every 10min.
 	"""