There is a youtube video that shows you how you should put your Blockchain.info recovery phrase into their website and leave your legacy bitcoins on blockchain.info wallet because if you do not they will not be able to credit your BCC.
As they are two separate chains now, doing it with private keys on empty address on one or another chain should work, right?
Shills in youtube comments.
No announcement from blockchain.info.
Typing your recovery phrase in such a manner on an unknown site?
Definitely a scam because you don't need to leave your bitcoins on blockchain.info when trying to claim your bitcoin cash. It's not even listed on the website of
bitcoin cash so it's easy to say that the site you mentioned can't be trusted with anything. It's likely an attempt to steal your bitcoins.