Yeah I was thinking about that too.
At what time does Mélenchon usually publish his videos on Youtube ? (or does he even have a specific time ?). Everybody is waiting for his move (even if apparently everybody is also expecting a "do whatever you want" position)
Now that LePen is directly calling out to his supporters directly I assume he'll respond sometime soon:
https://mobile.twitter.com/MLP_officiel/status/857936880393998336