Windows 7 is no longer supported and is obsolete OS.
TVE support on win 7 is buggy and has issues, see other threads.
What you wrote is a bit of a mess to interpret what exact questions you are asking.
Channels DVR support use of HDHR tuners, both the cable card based Prime and OTA antenna based tuners.
ATSC 3.0 support is still finiky and has some issues based on other users reports that have such channels to work with.
Channels DVR does have a comerical detection/skip. U set the setting in the server and it runs comskip after each recording has finished, once that finishes, then u can in the app skip commercial's. it does not remove or modify the recordings.
I suggest you do some reading and research on what Channels DVR is and how it works. There is plenty of documentation.