Way better introducing
Add some thumb up when good things happend
See if there is a better way to set up oauth
If patreon or link to buy in the description, add it to the answer
Add a process during downloading in order to let user modify artist and name song
list all songs
remove and rename
Add some direct interaction at low level (get status, erase, help)
Add an admin account for this purpose
Do FSM and dispatcher to FSM concerned if they wait this type of event, check if somebody care after
Modularize in order to unit testing
Abstract input
Add other chatbots possibility (telegram/Http ? / sms? )
See a way to monetize if growth => Youtube TOS for example
Analyze seen from FB in order to be more natural with timeout
IOS in a way or other ? => Google play music supported
Do some check regurlarly about youtube-dl (can break often) and update accordingly
Customize (photo and little description)
Understand non formal input
See tendance and show some music accordingly