YouTube: (from wikipedia) YouTube is a video-sharing website on which users can upload, share, and view videos, created by three former PayPal employees in February 2005.
The company is based in San Bruno, California, and uses Adobe Flash Video and HTML5 technology to display a wide variety of user-generated video content, including movie clips, TV clips, and music videos, as well as amateur content such as video blogging and short original videos. Most of the content on YouTube has been uploaded by individuals, although media corporations including CBS, BBC, Vevo, Hulu and other organizations offer some of their material via the site, as part of the YouTube partnership program.

Hulu: (From wikipedia) Hulu is a website and over-the-top (OTT) subscription service offering ad-supported on demand streaming video of TV shows, movies, webisodes and other new media, trailers, clips, and behind-the-scenes footage from NBC, Fox, ABC, and many other networks and studios. Hulu videos are currently offered only to users in the United States and its overseas territories. In order to ensure that no international users outside the US have access to the videos, Hulu blocks many anonymous proxies, Amazon EC2 IP addresses and virtual private networks.[citation needed] Hulu provides video in Flash Video format, including many films and shows that are available in 288p, 360p, 480p, and in some cases full 720 HD. Hulu also provides web syndication services for other websites including AOL, MSN, MySpace, Facebook, Yahoo!, and Comcast's fancast.com.

Found a favorite video on YouTube that you just have to have, but you hard to find a tool for you as below.

Q1: How do I download a YouTube video to a MAC?
A mac, okay so don't give me a random link that won't even download to a Mac. Please. What's a good website/FREE program I can download a youtube video and use it on iMovie? Please.

Q2: How do you download YouTube videos for Mac?
I once saw this video where it said "i got most of these clips from youtube" so how? is there FREE youtube video downloader for my mac i can use? i wanna make a trubute video and I need clips, not for copyright by the way. (from yahoo answer)

For resolving these problems, I search a tool--- FLV downloader for Mac in the website. Mac YouTube FLV downloader can easily batch download and save streaming flash videos from most streaming video websites like YouTube, Hulu (windows: Hulu Downloader), Yahoo, Google Video, Break, Metacafe, MySpace, The New York Times, ifilm, Gofish, Youku, 56, Tudou, etc. I hope it is helpful for us.