does anyone know how they did this effect?

[DickyHo]

does anyone know how they did this effect?start at 0:30
double mirror without seeing the camera
thank you for reading

[youtube]https://www.youtube.com/watch?v=Ez47c3NOr4o[/youtube]

[Michael_Szalapski]

I can't see your reference due to restrictions on the network where I work, but I'm fairly sure I know which video it is and it's done with a double for the talent matching the movement in a hole in a wall with no mirror at all.

[LordEdington]

There seems to be enough of an angle on the shot to do it without the camera being seen. If not then it would be relatively simple to do with a green-screen and multiple instances of the footage.