Apple's iOS does not allow videos to be downloaded from Safari. You can get the video on your phone through one of the following ways: Download your video from a browser on a computer and email it to yourself on Gmail. The Gmail app on iPhones allows the option of directly downloading videos. You can download the video on your computer and transfer it to your phone via iTunes. Once it's in your camera roll you will be able to upload it onto other apps such as Instagram. From the Download Options page, save your video to Google Drive or Dropbox instead of downloading it to your phone. Then use either app to download it to your phone or share to social media.