The number of video formats supported by the Panasonic TX-55CX680 is more than most TVs of a comparable spec and age to it. The most frequently supported video format is AVI, but this video format is not supported by this TV. The video formats 3GPP,AVI,FLV,M4V,MKV,MP4,TS,VOB,VRO,WMV are also supported by this television.
MP4 stands for Moving Pictures Expert Group 4.
WMV stands for Windows Media Video.
AVI stands for Audio Video Interleave.