There is a lot of conversation about blocking YouTube in schools. But there are also very good educational videos that teachers would like to use with their students in the classroom. I used to be able to download and convert YouTube videos with Zamzar converter, but that no longer works. What are you using to download and convert YouTube videos so you can show them in your classroom?
There are some good discussions within the Community on using YouTube videos and video tools in the classroom. With the ability to embed YouTube videos in other sites, teachers are turning to Edmodo and Google Drive and are able to use the videos without the need to convert them for use.
I think you mean Firefox, which does offer an add-on: YouTube to MP3 1.2.3 by Video2MP3.net which adds links to convert and download Youtube, MyVideo, Clipfish, Sevenload, Dailymotion, MySpace videos as MP3 files. Visit this site: http://www.video2mp3.net for more information.
I also use http://clipconverter.cc
You do not have to download anything except your video after the site does its' work. I use it all of the time
I typically use http://www.thatmp3.com
It automatically fixes ID3 tags and album art so everything looks all properly organized in your library/on your phone and what not. You can also crop files and the quality is pretty solid.
AppGeeker video converter (http://www.appgeeker.com) will give you options for needs of downloading video clips from YouTube and converting to common format.
What you need to do is stream the video online, a download icon will appear on the corner of video, just mouse click it and specify a path where to save it.