You have a good Internet speed and you want sometimes to view TV channels on your computer or laptop.
There are many free channels that can be viewed with different legal software applications.
One of the best is Readon TV Movie Radio Player. Just install it and you will be able to sort online televisions by country or genre (movies, comedy, news, music and more).
You can view live sports and listen a lot of radio stations.
This is one of the most useful software to view live TV and is free.