As far as I can tell, Viewly isn't a scam -- but maybe you're remembering viuly. Viuly was definitely a scam.

I'm pretty sure Viewly was first announced before DTube; Viewly ran their first alpha using the Steem blockchain. Then DTube came out with a (semi-)working product, and Viewly went to Ethereum to run their ICOs.

Viewly's new Ethereum-based alpha platform actually works, and actually does interface in some way with Ethereum smart contracts. I just verified all that in the past day. I was able to publish a video by manually calling the smart contracts from my Parity instance.