any iphone/ipod touch app that can download youtube videos?

[ElDogman]

i'd like to watch them in areas where i have no wifi access (like an airplane).

any app (non jail broken) that can allow me to download the youtube videos and watch it later?

 

[Gokunama]

Those apps were pulled a while ago.

If you've got a Mac, downloading YouTube to Mac, converting them to iPhone friendly format with freeware, and then uploading them to iPhone with an app like VideoSafe over the Mac's WiFi isn't that difficult.

 

[RiceRacerDX]

Those apps were pulled a while ago.

This is incorrect. There are still several apps out there that are capable of downloading things and saving them onto your iPhone. I use Downloads. You may also try Downloads Lite. The only difference is that the free lite version limits your downloads to 10 while the paid version ($1.99) is unlimited. I just saved a YouTube video by going to their website, finding a video, holding on the text for the prompt, and selecting download. Best of all, this does not require any sort of jailbreaking and is available in the app store. Try it.