Video and audio streaming are the new way to watch TV through the internet. The most common ways of streaming today are through YouTube, Netflix, Spotify and other similar streaming services. But there are other ways of streaming content, through online sites, streaming apps such as IPTV, Kodi, and many other methods.
The main thing to consider about Kodi, IPTV and other similar streaming services is that it is not illegal, but it is very much frowned upon by rightsholders because it CAN enable users to download pirated content, which rightsholders are not happy about.