The first stage doubled as the 2nd leg of the COVID-revised French Cup, which ES France airs as 30 minute highlight programs.The race website said highlights on eurosport tonight. I think that's restricted to France or european eurosport, as opposed to uk eurosport. It's not on uk eurosport tonight.
Besides for ES France, it will probably end of up on Ligue National de Cyclisme's YouTube page: https://www.youtube.com/channel/UCf7DdLToxZOfhxuBXeBMObQ/videos
Stages 2 through 4 aren't part of the French Cup so I'm not sure what if they'll be posted there, too.
Edit to add: I see now the that the ES France Stage 1 program is 45 minutes.