Just been chatting to a friend about this, best way to do it is to get the official FIA WEC app. You then purchase the races you want to see, either £4 per race or £18 for all minus LM or £25 including LM. You can then either view on laptop, or AirPlay/Chromecast to your main TV which is my plan.
You get all the live timing, practice and qualy sessions too. Not free, I know, but not bad value either.