PC? GDrive Mobile or standalone?.... If your not transferring data between two Apple devices, and your using a PC, then there may be nothing wrong other than a compatibility issue between your iPad and PC. As I'm sure your aware, Apple and Windows Operating Systems do not communicate well with each other, due to the fact that there systems take different formats than the other one. What format are the videos that you are attempting to transfer to the GDrive? Are they Standard for video, such as, .mp4, .mov, .avi,etc....? There are application out online for free that will help in the process of transferring your content to your PC/Mac computer. Try searching online for Like iPhone Recovery Transfer, this should allow you to access the files you need to transfer to your GDrive.