Why can't I swap a TL071 with a 741?
Well, if that circuit does in some way function it's well outside of the normal operation of a 741. The common mode range of a 741 only goes to within a couple volts of the negative rail, below that the current sinks that bias the differential front end will no longer function. 



Even with a single-supply op-amp the circuit will not function properly because the op-amp output cannot swing below ground. 



A horrible, horrible circuit and he did not demonstrate it working, just producing a horrid buzzing noise.