I don't use TikTok so maybe I'm offbase, but I tihnk while technically it could've existed without mobile, socially I'm not so sure.
I wouldn't under estimate the amount of friction reduced in having an app on your phone which a) is always with you, b) can also record top quality video and c) has a data plan good enough to upload there and then.
I wouldn't under estimate the amount of friction reduced in having an app on your phone which a) is always with you, b) can also record top quality video and c) has a data plan good enough to upload there and then.