The Walt Disney Co. is among a crop of new investors pumping $60 million into Dotcast, a high-speed service designed to use TV signals to send Internet-style video to wireless devices. Other firms taking a stake in the Palo Alto-based company include Intel Capital, GE Capital, Quantum, Angel Investors and Worldview Partners. Dotcast said it requires $40 million to build a nationwide network that will piggyback on top of PBS television signals to distribute video, games and other Internet content to home computers and wireless devices. The current round of funding brings Dotcast’s total to $80 million. IBlast and Geocast Network Systems are planning similar technologies.