Due to a change in the schedule of His Holiness Karmapa there will be no teaching on the 3rd of February. By that there will be of course also no webcast. According to current information the teaching and webcast on the 4th will take place as announced.
Even so the teaching webcast on February 3rd is cancelled there might be a webcast from a ceremony at the Mahabodhi Society, where currently relics of the Buddha are displayed. Please check the webcast page for latest news about this possible webcast.