It is illegal to:
- use information received to aid in the commission of a crime, or
- disclose information received to other persons.
Rebroadcasting to the internet makes it more easily available. It makes it so you're phone can get the info from the scanner. It makes it so an officer running a license that returns a warrant, can potentially tip off the individual listening in via the internet.
So in NY does that change the tables slightly and cause a different level of response to be appropriate for the officer yes.
Are you doing something illegal? Well as NY state law is more restrictive on this topic than US federal law, you'd really have to consult a lawyer in your area familiar with what applies to you to get guidance.
Not to mention this sort of thing is what the administrators in such departments push to go digital and encrypted, so for that sake, regardless sof legallty I'd pull them down and keep the reception to myself for a while, sort out if it's legal or not and then go ahead and make a descion on whether or not to link up the feed.