Download the videos you want from YouTube seems diffcult. Then here is how u can download the videos and afterward u can to convert to .avi, mpeg or other formats to put in your ipod video, psp and etc.
Go to fileleecher and paste the YouTube video link you want. Afterward you press the download button, you will shortly download the video. The format should be in .flv and u can play in VLC player. Then you’ll need to download the encoder to convert the .flv file format into other formats if u want to play on your ipod, psp and etc.