Videos wont play

Go into Videos, Video Settings, make sure the TV Out is set to either Ask or Off.

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It is very easy to use,just follow the instructions on it you can convert your videos and make your movies and music taken easily on PSP, PS3, iPod, iPhone, Apple TV, Xbox or other digital devices.
Hope this can help you.

Try reseting it, It worked for me. Hold down the "Menu" button and the middle button for about 7-8 seconds.
Hope this helps!

Try resetting it, toggle the hold button on the top of the ipod on then off, then hold the middle and menu button at the same time for a few seconds.

buyying a other one... lol

One main thing is to try to delete the video that you can get to work, and put it back on after. Mak esure you are in the videos tab.

Press and hold the Menu and Centre buttons at the same time until the apple logo appears. (This usually takes between 5 and 10 seconds.)
Information from: http://ipodsurgery.com/reset-frozen-ipod

i think the Daniusoft DVD to iPod Converter is your best choice, it alway works well for me. Many of my friends are using this product.
it is one of the best DVD to iPod Converter softwares, that could not only rip DVD to ipod formats , but also separate audio track from DVD file with stunning speed and amazing
quality.
their website: http://www.daniusoft.com/dvd-to-ipod.html#10210
Hope this may help you. good luck.

how do you reset? mine is completely frozen

you can only get some videos whose format is compatible with your iPod nano, as i know, mp4, mov, are supported by iPod nano, while wmv can not be played on iPod nano. so you'd better convert your video format before you view them on your iPod nano.
here, such program such as any video convert, handbrake,etc. are free but they may have limits or bring some virus. you can try the video converter ultimate, it can help you to convert format easily and effortelessly.