fix (video): Don't pre-load with no channels.

bot/modules/moderation/video/admin.py

@@ -55,13 +55,14 @@ class video_channels(settings.ChannelList, settings.ListData, settings.Setting):
             for guild in client.guilds
             if any(channel.members for channel in guild.voice_channels)
         ]
-        rows = cls._table_interface.select_where(
-            guildid=active_guildids
-        )
-        cache = defaultdict(list)
-        for row in rows:
-            cache[row['guildid']].append(row['channelid'])
-        cls._cache.update(cache)
+        if active_guildids:
+            rows = cls._table_interface.select_where(
+                guildid=active_guildids
+            )
+            cache = defaultdict(list)
+            for row in rows:
+                cache[row['guildid']].append(row['channelid'])
+            cls._cache.update(cache)
 
 
 @GuildSettings.attach_setting