There is a webinar on Colonial New York Research on the Legacy Webinars website. It is free through Nov. 4th. After that you will have to have a subscription to the Legacy Webinars.
The presenter is Kory Meyerink, a professional genealogist, who is accredited in four areas (Germany, Midwest, Eastern States and New England U.S.). He specializes in the colonial northeast and tracing the origins of German and Dutch immigrants. His presentation runs about 90 minutes. I’m sure it will be of help if you have colonial NY ancestors.