There are multiple posts about this. MeTV is a broadcast network carried by a local TV station. Comcast just passes on what is broadcast. The local station made some changes and apparently dropped MeTV.
Can't speak for your market.
In my market MeTV is carried on a 'sub channel' of the NBC affiliate. In my travels I have found it being a 'sub channel' for a CBS, FOX and ABC affiliates.
If you watch whatever MeTV station long enough - the owner station will put some of their own programming on the channel, overriding the MeTV content.
Locally, the parent station puts its News on MeTV at 10 PM - it's regular newscast is 11 PM.