It's not impossible to fall in love over video or phone dating, rather the risk of doing so is dire. Usually we tend to forget that we engage with online dating, hence we ignore the actual reality of the world we live in. The vast majority of individuals on dating sites doesn't necessarily want the same thing - some might exist to fulfill their selfish motives or do something else than actually wanting to pursue something serious. We cannot shun away from the reality of this cruel world, therefore we need be extra cautious with the people we fall in love with as they might not appear as what they portray to be. Thus, I don't consider falling in love online deems to be sustainable at all.