Anyone can access your videos unless you have restricted access to them.
You must be at least 13 years old to use the service.
Privacy settings can be changed on your account. The options allow you to upload videos and choose who can see them.
To access the privacy settings on your video, click settings under your video on the video page, then click the Privacy tab.
Global Video Settings allow you to apply privacy preferences to all of your existing videos and set preferences for future uploads.
Yes, there are options to pay for upgraded memberships which allow you to get more control of your videos, more storage access, adverts, and access to tutorials.
For more information on pricing visit Vimeo Pro.