With the lifting of the state of emergency on Thursday June 24th, the authority for virtual meetings ends on June 24th. This means library boards must now meet in person starting on June 25th.
Open meetings law does allow for a member to meet virtually, as long as there is both a video and audio component. Additionally, all locations in which members are participating need to be advertised and open to the public. This means that if a board member dials in from home their address needs to be included in the board meeting public notice and made accessible to the public.
You can find more information about Open Meetings Law at https://opengovernment.ny.gov/.