Can i watch m3u list and dvbt2 tv or cable tv on the same row? Or i must have a different software to watch this? Because, i have a cable tv, and i watch to pair with this, and add m3u to have more channels. Can i seeting this to open channels automaticaly when i open box?
European HDHomerun Connect should give you DVB-T2 in Live Channels. But since you say you have cable, are you sure you're not looking for a DVB-C tuner? In which case, you should aim for the Expand instead, I have no clue why HDHR couldn't figure out how to make one device with a T2/C hybrid tuner. Also, if your cable needs to use a CI/CAM to decrypt the signal, you're out of luck so far.
As for m3u, there's a couple of options right now, I prefer to use Cumulus TV to get it into Live Channels.
Then you have it all in that one app: Live Channels - it comes pre-installed on Android TV... which makes me wonder, how do you do it right now?
I don't know about auto-opening the Live Channels app, I think there is something out there, but I like to see the Android TV home screen with its recommendations etc. after it's turned on, Live Channels is anyway just one app selection away, I have arranged it to be the very first app in the first row beneath the recommendations row.