“Avengers” director Joss Whedon released his newest film, “In Your Eyes,” online just as it premiered at the Tribeca Film Festival late on Sunday, joining the ranks of filmmakers experimenting with straight-to-consumer digital distribution. In a surprise video message to fans, Whedon said he was disappointed he could not be in New York for the debut of the paranormal love story that he wrote and which was directed by Brin Hill.