Here are some resources for watching at home. I’ve paid for the FIA WEC app this year and so far it has been excellent, without the repetitive adverts you get on Eurosport.
Free practice Wednesday 15:45 to 19:30
Q1 20:50 to 23:15
Q2 Thursday 17:50 to 20:50
Q3 20:50 to 23:15
Race coverage generally Saturday 13:00 until finish. Race START is 2pm UK time = 3pm French to me.
Coverage will be on Eurosport and through the FIA WEC app
Highest quality 24 hr commentary is through Radio Le Mans broadcast online. It’s usually best to watch one of the race feeds with the sound muted and Radio Le Mans playing over the top.
Main site: http://www.24h-lemans.com/en/
Background and entry list: https://en.m.wikipedia.org/wiki/2019_24_Hours_of_Le_Mans
Best Le Mans commentary: listen live online, Radio Le Mans: http://www.radiolemans.co/
Watch online (not free to watch in the UK):
FIA site and app: https://www.fiawec.com/en/live (£9 for race weekend with what look like excellent resources)
Eurosport and Eurosport Player. Just a warning, I got the 7 day free trial of Eurosport Player last year and the feed was terrible and cut off every hour or so. When I paid for it a few years ago it was a bandwidth hog. Both times I’ve ended up using an illegal feed instead, to either get rid of the stuttering or whatever the other reasons were that I’ve forgotten about. The repetitive adverts become UNBEARABLE as well. I’m not sure I can recommend it.
MotorTrend On Demand (they do Roadkill etc on subscription) have a 14 day free trial running and are broadcasting the race. American viewers overnight said quali was included and looks like race won’t be blocked for the trial. Download the app and sign up; may also be broadcast direct on their website, though still behind the paywall. Don’t forget to cancel the trial...
There is always a feed on Race Department. I’m still not sure if this is legal or hooky, but they host it every year: https://www.racedepartment.com/
Most of the teams broadcast live onboards from their cars for free for the full 24 hrs and are well worth a look. Easiest ones to find are Porsche and Corvette. I’ll post some links if I have time to find them.