The User Manual states on page 105 that you can connect a BT audio device, quite equal to "AUX IN". The Reference Manual shows a connection diaggram on page 110 that the BT Audio is effectively just an "through" input, so it cannot be linked to DSPs, effects etc.
The guy in the video clearly has heavy reverb on his microphone, so either he is using a wireless mic connected to the MIC input (so you can use effects) or he uses a BT mic which has built-in effects.