I am very well suited to the Drive and its functions and limitations, however, this appears to be a bug because some new update, I'll explain why:
All users logged into a Google or affiliate, gmail, youtube, google own account even can not watch videos Google Drive (just got 1 week ago)
I'll give you an example, try accessing this video:
https://docs.google.com/file/d/0B7TgbQ5zIGbJLXpjaWE3RnJZaEE/preview
Ok, appeared: At the moment, you can not play this video. The number of permitted reproductions was exceeded. Try again later. Correct?
Now do the following, log out of your Google account, and update the same page that gave the above error. or Press Ctrl + Shift + N (In Firefox) and browse in incognito this same link.
The loguin Google itself is preventing people from accessing the videos.
Noting this problem, make the problem worse:
Before a week behind everyone was downloading typically with the file being properly shared publicly on GDrive.
Now I'll give you an example, try to access the file download the same movie I quoted above:
https://docs.google.com/uc?id=0B7TgbQ5zIGbJLXpjaWE3RnJZaEE&export=download
Encountered the error:
not Found
Error 404
Correct?
More for me, I'm the owner of the file it will be normal, important to know that the same file, last week could be downloaded by anyone, before you ask if you checked the permissions, checked for sure.
Now I humbly ask that if someone does not have a good answer for me, to please get in touch with the developers and inform as I mentioned above, it is not only my website that this failing because of this bug, all websites dependent GDrive are REQUIRING that thousands of users desloguem their Google accounts, to be able to watch movies, not to mention that none can be downloaded.
This warning is on all websites that rely on google, I believe this to be extremely damaging to Google, and we mainly users who pay good money to use the space of the drive.