Fix @everyone mention

bot.py

@@ -162,8 +162,7 @@ class Bot(discord.Client):
                                 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))
+            await channel.send('@everyone {note}**{title}**\n{link}'.format(note=note, **video))
 
     def make_youtube_embed(self, playlist):
         embed = discord.Embed(