First things first, you should know that all the videos that you got from the iTunes Store will be for sure compatible with your iPod. If you got your files from somewhere else, the chances are that they cant be recognizable by your device and you will need to convert them into the format that is compatible.
If you do have some files that you need to convert, it will be enough to download iPod converter from google and install it on your computer. After the installation, you should just place the files you want to convert into the program, select the type of file you want to get and let the program do its job. Then, connect your device to your computer using the USB cable that came with it, and transfer your files onto it. We recommend
Apple devices do support a lot of formats, but there are even a bigger number of files that this company does not support. If your videos are in XviD, DivX, Rmvb, rm, VOB, FLV, MPEG, WMV, DVD, AVI, 3GP, MPEG, if it is a YouTube video or a DVD movie, your iPod will not be compatible with them and you need to convert them. There can be another problem. Your videos are compatible with your device, but they are maybe too large, so you still need to convert them. This can be done in iTunes, where you can change the video size and speed in order to be playable on your iPod.
Your iPod will play all of your videos if they are encoded using MPEG-4 or H.264 codecs. Extensions of these files will be moved, mpg or m4v. if you encoded your files using codec h.264, the video will be encoded at a resolution 320×240 pixels at 768 kbps. With the MPEG-4 the videos are encoded up to the 2.5 Mbps with the resolution of 480×480 pixels and they can be played at 30 fps. The same video formats are supported in iPod touch also.