The LATV website seems to be down right now, but here is a brief but accurate description of what it is from Wikipedia:
LATV - Wikipedia, the free encyclopedia
One of their outlets is KLAS 8.2 digital subchannel in Las Vegas. It all started on KJLA channel 57 which is a rim-shot Los Angeles DMA station in Ventura. Their digital transmitter is on Mt. Wilson, but for distribution in the LA area they have relied mainly on cable and LPTV channel 33 in the San Fernando Valley.
Thanks for pointing this out - they are showing the Vegas stations.