No; notification is not required for protection. It is, however, very helpful for potential users.
No, you do not need to display a copyright notice on your work to protect it in Australia. Copyright protection is automatic upon the creation of an original work, provided it is fixed in a tangible medium. However, including a copyright notice can serve as a useful reminder of ownership and may deter infringement, but it is not a legal requirement for protection.
No. Since 1989 it has not been necessary to put a copyright notice on any work in order for it to be protected
No. A copyright notice hasn't been required since the laws were changed in 1989.
To protect the integrity of your work. Why should others make money etc from your work without paying you?
A copyright notice indicates the year of publication, and the name of the rightsholder. Although it can be helpful for identifying the person or organziation you need to contact in order to use the work, it's not required for protection.
No; protection was automatic in 1990.
There are a great many "urban myths" surrounding copyright law but the two most popular are probably... 1) You have to put a copyright notice on a work to protect it (not since 1989) 2) If I don't charge money for it it's not an infringement. (yes it is)
You don't need to formally copyright a document, it is automatically copyrighted. As soon as a work of sufficient originality is "fixed in a tangible medium, perceptible to human eye, machine reader or other device"copyright exists. There is no requirement to register or to display a copyright notice for a work to be protected.
Wherever a copyright notice would typically appear, you can replace it with "I, the copyright holder of this work, release this work into the public domain. This applies worldwide."
Anyone who creates an original work is using copyright to protect it.
You don't. Concepts & ideas do not qualify for copyright protection, only the perceptible expression of those concepts and ideas will. Write the story. Upon completion it will automatically gain copyright protection.
Delete the video or go to My Videos and resolve copyright issues or ask the creator of the work you infringed to license their work for you.