In order to upload a video to YouTube that is longer than 15 minutes you need to change the settings on your YouTube account.
To change your settings follow these directions:
Upload videos longer than 15 minutes.
By default, you can upload videos that are up to 15 minutes long. To upload longer videos, verify your account with the following steps.
- On a computer, visit the upload page at www.youtube.com/my_videos_upload
- Click Increase your limit at the bottom of the page, or visit https://www.youtube.com/verify
- Follow the steps to verify your account with a phone. You can choose between receiving the verification code through a text message (on a mobile phone) or an automated voice call.