Using potatoes for plant propagation

It appears that someone extremely powerful was very confident that he could force the domain investor to sell the domains in hubli, so youtube was showing ads repeatedly for growing roses using a potato.
A large number of people have tried rose plant propagation using potatoes.
some have been able to grow their rose plant from a rose stem cutting, while others find that the rose stem becomes black and dies.
After doing research on growing roses using potatoes, most of the stems have dried after some time, though a few small leaves were spotted on one small stem.