MOSCOW--(BUSINESS WIRE)--SPIRIT DSP, the world's No. 1 voice and video over IP engines provider serving more than one billion users in over 100 countries, announced today release of the new version of its massively multipoint web-videoconferencing software VideoMost 4.0. This new version enables concurrent, interactive video participation of 100 people in each conference on PCs and tablets. VideoMost 4.0 allows up to 100 participants in a conference to receive and transmit video and voice from