IGTV requires users to login with an Instagram account. Mobile devices allow uploads of up to 15 minutes in length with a file size of up to 650 MB, while desktop web browsers allow uploads of up to 60 minutes in length with a file size of up to 3.6 GB.[5] The app auto-plays videos as soon as it is launched, which Kevin Systrom contrasted to video hosts where one must first locate a video.[6][7][8]