Daily I am getting many queries by my viewers asking how to download YouTube videos on iPad and iPhone without jailbreaking their device. There are many apps like YourTube and few others, which let you download YouTube videos but for that you need to jailbreak your device and I am sure you would not like to do this with your new iPhone or iPad. At least I would never do that with my new iPhone 4 and iPad 2 as I love them and I would jailbreak them only when I need to do some very important things on it.
For YouTube videos streaming you may try many apps and YouTube mobile is one of them which can stream videos on your iPhone and iPad however when it comes to downloading the videos, it just can not do that job. So for that you need to have some other apps which can do it for you without jailbreaking your device. For this you need to have an app called TagDisk HD and all you need to do is install this app and then go to YouTube.com and after select the video you want to download you need to tap the option download and you are done. I am embedding a video too for better clarity and it will explain you the complete thing is few easy steps.
Get this app HERE.
I am sure you would love to use this app from iTunes as this is free and most importantly you need not jailbreak your device. Do let me know if you need any assistance in doing this.