There’s a problem with traditional video conferencing clients. Though they are in abundance, they’re only remotely useful if all parties are collectively using the same client. Popular services such as VoxOX, ooVoo, IMO and, of course, Skype and Google Hangouts all have this problem, thus putting a damper on quick collaboration.
One “solution” to this is to have accounts for them all, which is something I used to do. The best solution, however, is to use one of the many free video conferencing websites that don’t require an account for hosting your online meeting .