can u post a video …
can u post a video on how to install scripts to godaddy

Drupal is a Open …
Drupal is a Open Source. So, its free and you can download it directly on the drupal website.

You can install Drupal on the majority of the webhosting service. GoDaddy is one of those but you can chose another one to host your website (I recommand to get another. GoDaddy is a bad and slow webhoster).

can you download …
can you download drupal without buying the godaddy hosting?

yes that is true
yes that is true

Drupal is free …
Drupal is free software anyway (Go Daddy is not giving it to you).

i use 000webhost, …
i use 000webhost, which include a site builder and fantastico auto installer which installs drupasl joomla wordpress phpbb and much more for free in under 2 minutes!