You dont need it to PLAY WoW, but to download patches and install the actual game you do.
For many reasons you may need a youtube downloader, lets say when you have limited access to the internet so you want to download the videos offline on your mobile or PC for later use. With everything shifting online you do not neccessarly need to have downloader offline you can use online youtube downloader there are so many of them with different features you can just search for it
No, "blizzard" does not need to be capitalized unless it is the first word in a sentence or part of a proper noun like "Blizzard Entertainment," a company name.
Yes, since you are downloading you will need the internet
Yes, you need a Battle.net account to play World of Warcraft. A while ago Blizzard required that all World of Warcraft accounts be merged to Battle.net accounts.
You can not be a GameMaster (GM) in World of Warcraft on the official servers. GameMasters are paid Blizzard employees trained to provide support in the game. To be a GameMaster, you need to live near Blizzard's headquarters as that is the only place that you can access GM powers from.
You need to use a downloader tool to save the downloaded video to your flash drive. This could be helpful videopower.me/tips/ct-download/best-hd-video-downloader/
If your Blizzard password is invalid or won't let you in then you need to contact Blizzard. Get them to reset your password using the email you have registered for the account with. If your email has been changed, then contact Blizzard and see if they have a record of suspect activity on your account.
I think you just need a Youtube downloader, then everything will be OK
download free music /linktr.ee/tj1999
Just search for them using a song downloader such as Limewire
The Blizzard Billing page linked below has all the information you need in regards to trying to get your account back.
The official Blizzard support site is listed in the links below. Do not trust that battlenet support betacom whatever address, dont even know where you got it from. If you need help with a Blizzard game or battlenet, to the link below. It is the official Blizzard support site.