reference video
Minecraft Bedrock Edition is not too keen on the method i've used to create this menu screen, so if you use the controls, here and there, they won't register. Just retry. Anyways, from the "Play" screen, make your way down to the third button which should be "Settings". (Jump to select, crouch to scroll) Once you select Settings, you will be redirected to the next button "Dynamic Camera". Press jump and make your way to save and quit. Have fun!
what is dynamic camera? -
"The Dynamic Camera feature in Find Your Brother relates to the way the new camera reacts to player movement, this change creates a very interesting sense of immersion in the gameplay of Find Your Brother. However, if you find this setting too hard to play on, or you just prefer the regular Minecraft look, you can disable it within settings. It is very easy" - SlimeUsername