Originally Posted by bilan
Same this picture can help me ?
As far as I know, all AOSP/CM based ROMs don't have video calling because the codec used to compress the video in a 3G video call is heavily patented, and it would require a royalty payment for each and every device using that codec.
OEMs like Samsung, can easily afford these payments while CM, AOSP, AOKP ROMs work for free and cannot pay the licensing fee, specially not for each device CM is ported to.
If you want video calling you on 4.4, you can wait and hope that Samsung will give us official 4.4 upgrade, or you can use third-party apps like Skype, Hangout etc for video calls
P.S. it's spelled V-I-D-E-O not VDO