People are making music at their leisure and publishing it online. YouTube has provided a space for musicians to publish multitrack music videos, join collective musical ensembles, and collaboratively perform with others. This chapter explores three trends of how musicians are creating music videos and forming virtual ensembles and music making communities: they are showing off their skills through music videos; they are creating videos to join large collective multitrack ensembles of hundreds or even thousands of others; and they are actively collaborating with small groups to create mediated performances. Collective and collaborative music making on the Internet are not only happening among grassroots amateur musicians, but also through educational and commercial institutions. Music making on the Internet allows for global interactions and collaboration, where people come together and enjoy music recreationally, unbound by time and space.