How to get videos from youtube?

Now I want to share you the way of putting DVD movies and videos on your Portable Player…. so as you can enjoy them with your friend at any time and any where for get more funs.
All you need is Pavtube
Note: Games purchased for iPod (5th generation) do not sync to iPod classic or iPod nano (3rd generation).
Convert video. Rip video. Save in iPod, iPhone, PSP, PDA, cell phone formats. Do it all with this powerful video file converter.
All key formats are supported!Video to 3GP Converter is a powerful 3GP converter which can convert all popular video files to 3GP video format such as AVI to 3GP, MPEG to 3GP, VOB to 3GP.
YouTube supported video formats are as follows:
MPEG (MPG)
YouTube recommends MPEG4 (Divx, Xvid) with MP3 audio. This option probably provides the best compromise between quality and file size. Other versions of MPEG are also acceptable.
AVI
This is the default format used by many editing programs. It provides excellent picture quality but file sizes are large. This can be a good option for short videos.
Many of you may wonder why there's a need for a DVD to iPod converter.
These are perfectly acceptable, but may not provide the same quality or small file sizes as MPEG4.
Video Size (Resolution, Pixel Dimensions)
YouTube recommends a resolution of 320x240. Note that this is smaller than the standard YouTube video screen — videos this size are automatically expanded to fill the screen. A quick test indicates that the screen used for the main YouTube player is 450x338 pixels (do not take this as an official specification though).
On the whole, 320x240 is a fairly good compromise which suits the different player sizes well enough. Remember that the video will not always be seen on the large version of the player, and some versions of the player are actually smaller than 320x240.Best DVD to iPhone Converter is a multifunctional tool, which does not only convert DVD to iPhone formats but also edit the output.
YouTube website allows people to upload videos including WMV, MPEG4, MOV, AVI,FLV and MPEG
I think the Movavi Video Converter is your best choice,It alway works well for me. It is a groundbreaking video format converter you can use to convert video & DVD files.
Input Video Formats:
AVI (including DivX, XviD, MJPEG, and other codecs), DV AVI, MPEG 1,2, MP4 (including H.263, H.264, and other codecs), Windows Media Video (WMV, ASF), 3GP (3GPP, 3GPP2), QuickTime (MOV, QT), DVD (VOB, IFO), MOD, DAT (VCD, SVCD).
New: M2T, MTS, MKV, VRO, Flash (FLV).
Output Video Formats:
AVI (including DivX, XviD, MJPEG, and other codecs), MPEG 1,2, MP4 (including H.263, H.264, and other codecs), Windows Media Video (WMV), 3GP (3GPP, 3GPP2), QuickTime (MOV, QT) Real Media (RM, RMVB).
New: Flash (FLV).
Output Video for Mobile Devices:
iPod, iPhone, Apple TV, PSP, Zune, PDA/Pocket PC (including BlackBerry), Creative Zen, Archos, Epson media players, cell phones, smartphones.