We don't know what area you're in, what country you're from, or even necessarily which planet, so "channel 7" doesn't mean very much.
Check whether your TV provider has an app which lets you stream TV - or do a search on the app store for the name of your "channel 7" and see what comes up.
Depending on your location of course, PBS, ABC and NBC all have apps that allow streaming of recent shows. Some cable companies also have their own streaming apps, although those are contract based (in other words you have to enable your cable/satellite contract to allow streaming, may or may not be free)
other stuff varies by location and sometimes even content.