Q: Available Storage figure on iPad does not agree with figure shown in  iTunes Sync on iMac.

Settings>About shows there are 5 videos stored on my iPad when I know there are none. This has caused Settings>General>Storage & iCloud Usage to falsely report only 4.6 GB free space available. When synced to iTunes on my iMac 12.7 GB of available free space is indicated, which sems more reasonable. How do I convince iPad>Settings to report the correct number? I've tried a number of resets of the iPad, but no joy.