Actually, from Antoine21’s video, I saw he has chosen the makeblock (not makeblock_le). In the Makeblock APP, all the makeblock robot bluetooth signal show as makeblock in detected list now (no matter using Bluetooth 2.0 or Bluetooth 4.0).
The mBot Bluetooth is dual mode, the makeblock_le means Bluetooth 4.0 previously. But now, we name both as Makeblock on mobile devices. Antoine21 mentioned the makeblock_le, he may see it in the pop up error message.