"update 27/01/2020:
the bot will no longer download large files for everyone.
large files mean all whose size is more than 1GB.
update 04/02/2020:
The ability to download files of any size through the bot will be available only to registered users who wish to support the "cwbot" project (send your nickname via 'Your message:' in form for donation which is at the end of this post and the bot will no longer show you the message "size >1Gb skipped").
update 07/04/2020:
Unfortunately, there are no other support methods other than bitcoin."
Donate bitcoins, dude.
