Plot hole: Fabienne Beriot is a crack investigation journalist who wrote an entire book about Pellegrini's corruption and crimes and was hellbent on dragging him through the mud. Yet she is unaware of what happened to Assane; somehow she managed to Miss in her lifelong investigation the 'small' fact that Pellegrini saved his empire by cashing in huge insurance money thanks to a very public theft that screamed insurance scam.
Plot hole: Lupin is a super-smart character who is always way ahead of his competitors. He acquires a VHS tape that is a smoking gun on his most hated enemy. He puts online (so he managed to convert it in digital format) a small clip as 'teaser' and shares it on twitter, where it goes viral. Then he goes to national TV...where the director is in cahoots with Pellegrini and plays a version of the tape that edits the incriminating part out. And that is enough to entirely defeat him. Apparently, he did not have a digital copy of the whole thing he can release to prove the editing job! It does not make any sense, especially since he knew that Pellegrini had the official media under his control, and him going on TV - lying about his own identity under a ridiculous makeup - couldn't have any positive effect worth the risk.
