The Mockingjay Part 2 Bluray contains many exciting special features and behind the scenes goodies but there is one piece of content, a secret Easter egg, which is more difficult to find.
To find the Easter egg a set of instructions must be followed involving both the Mockingjay Part 1 and Part 2 bluray DVDs. However the task is challenging but well worth it to unlock the hidden deleted scenes.
On the Part 1 Blu-ray
The Part 1 bluray must be used to obtain a set of codes. These are displayed under each character on the main menu and consist of both letters and numbers, try to note down as many of these codes for future reference later on.
On the Part 2 Blu-ray
This is the tricky part, before the main menu appears a brief scene is shown where squad 451 are watching a Capitol propaganda broadcast. On the table in this scene there is a blue flashing device. To access the Easter egg menu, you must press the blue button on your Blu-ray remote along with the flashing blue light on the device this will take you to a secret menu where you will be asked for the codes that you noted previously. Each of these will reveal a deleted scene! However putting in the codes is also not 100% straight forward as they contain both letters and numbers and the typical Blu-rray remote only allows number input. To get past this, all we would say is look to the blue column of numbers and letters running down the side of the character codes noted from the Part 1 bluray, these will give the answer.
Good Luck finding the Easter egg!