This is likely caused by Macrovision copy protection. A Macrovision descrambler connected between the DVD player and recording VCR should fix the problem.
None of them. By definition, a DVD playeronly plays DVDs, it cannot record or copy them. And if you want to make a copy of your friend's store-bought DVD of Life of Pi, it won't work. Commercial DVDs are copy protected, and a DVD recorder will not copy a protected disk.
Unless you have the rights or permission to copy a DVD, never.
Hard copy is like a audio CDs and DVDs
Same thing as in Windows. You need a DVD copy software to help you, I suggest you use Longo Mac DVD Copy from http://www.longodvd.com , it can automatically decrypter copy protections of DVDs and copy DVDs to hard drive or burn DVDs to blank discs easily.
Nero
No. Windows Vista does not contain any software to copy or convert commercial DVDs. You will need to download or purchase another program to copy DVDs.
Many companies provide software for copying DVDs, like Lightscribe. They provide various drives that can be used to copy DVDs and special DVDs that you can buy.
You can get all of those dvds from their website.
No. :D
A DVD copier is usually called a DVD burner. It's function is to copy DVDs using a home computer or laptop. You will need a computer with a DVD burner and a blank DVD to copy DVDs.
Some places to purchase wholesale adult DVDs include specialized adult entertainment distributors, online adult DVD wholesalers, and adult industry trade shows. These distributors often require proof of age and a business license to make wholesale purchases. It is important to research and vet potential suppliers to ensure they are reputable and offer high-quality products.
External hard drives do nothing on their own. Their purpose is for you to put data onto them. You could very well copy DVDs and put them on the hard drive, but they aren't going to do that by themselves.