Thanks for the kind words!
> If I'm not wrong, quickly reading your beautiful synthetic python code, you store music in your server (as a MongoDB blob). ins't it ?
Nope, the bot only stores track title, performer and id. Actual media is stored on Telegram servers.
> Just an idea, maybe always interesting for sort of "auto-deleting" sahring, as secret messages (but could be wrong).
Yes, I'm thinking about it.
> I noted that search functionality could be developed to understand better what user are looking for, but this is not a criticism of your excellent work, just a feature for a future implementation!
Sure, I'm open for any suggestions and criticism :) I'm thinking about how to improve it.