This software has special requirements (for the video streaming and live interaction part as regular web hosting is not enough):
http://videowhisper.com/?p=Requirements
Options for the required rtmp hosting, starting from $9/month (for remote rtmp only with basic videochat support):
http://videowhisper.com/?p=RTMP+Hosting
You can also take a look at our turnkey remote rtmp plans starting from $9/month that can be used in addition to a regular web host for basic videochat and live streaming functionality:
http://hostrtmp.com/
To easily compare all hosting types and available features, suitability see:
http://hostrtmp.com/compare/