SKYPE is very popular, effective and FREE from one single device to another single device, whether computer, smart phone, tablet or SKYPE-enabled HDTV or Blu-Ray Player:
The simplest for a neophyte to operate is a SKYPE-enabled HDTV or Blu-Ray Player. Note that WebCams are available in 480, 720 & 1080 resolutions.
SKYPE Premium subscription (from $4.99/mo) adds Video Conferencing among MULTIPLE Skype users:
SKYPE automatically adjusts the transmitted resolution to match the available average thruput. Note SKYPE recommendations:
SKYPE was the first to solve the plethora of AUDIO problems that plague many Video Calling programs.
For other alternatives, eg MS Office Live Meeting ($5/mo), GoToMeeting ($49/mo), et.al., see fol. list:
One-on-One Video Conferencing works quite well....until you get tired of looking at each other fidget through a meeting.....
When you have more than two or three people trying to squeeze into a single camera frame, you're better off going back
to your individual offices and use Multiple-User Video Conferencing, with each person appearing on the screen as part
of a 6 or 9 person mosaic....any more than that and you lose track of who is who and who is talking and might as well
be on a regular AUDIO Conference Call.
I've been in MANY Video Conferences, ranging from one-on-one to 30+ persons on each end (Only ONE speaker appears).
But the most EFFECTIVE meetings among large number of people have been regular AUDIO Conference Calls, where
you are forced to concentrate on the WORDS, rather than getting distracted chuckling at people's facial quirks.....