Avoid deduplicating scheduled reminders

bot.py

@@ -142,7 +142,7 @@ class Bot(discord.Client):
         except YouTubeError as e:
             return
         published = entry.get('published')
-        if published:
+        if published and not entry.get('reminder'):
             if [v for v, p in self.yt_videos if v == video_id and p == published]:
                 return
             self.yt_videos.append((video_id, published))
@@ -155,7 +155,9 @@ class Bot(discord.Client):
                     remaining = (scheduled_start - datetime.datetime.now(datetime.timezone.utc)).total_seconds()
                     for minutes in COUNTDOWN:
                         if remaining > minutes * 60:
-                            Timer.schedule(scheduled_start - datetime.timedelta(minutes=minutes), data)
+                            payload = data.copy()
+                            payload['feed']['entry']['reminder'] = '{0}m'.format(minutes)
+                            Timer.schedule(scheduled_start - datetime.timedelta(minutes=minutes), payload)
                     note = 'Live in {0} minutes!\n'.format(int(remaining / 60))
             mention = channel.guild.default_role.mention
             await channel.send('{mention} {note}**{title}**\n{link}'.format(mention=mention, note=note, **video))