A:AnswerI purchased this Ipod touch about a month ago the dimensions are 2 1/4" wide and 4 3/4" length. That's two and one quarter inches wide, and four and three quarter inches long.
A:AnswerYes, you can download Pokemon Go the the iPod, but it requires an internet connection (e.g. LTE, 4G, etc.) which isn't available on the iPod. The only way to use the internet is if you have a wifi connection. The same goes for all apps that require an internet connection (Google, Spotify, Netflix, and so on). If you are in an area where there's Wi-fi, then you can play as you normally would.
A:AnswerIf the songs are already uploaded to your iPod, you shouldn’t need wi-fi to listen to them. You’d only need wi-fi to connect to the iTunes store.
A:AnswerIf you have You Tube subscription yes you can download. Itunes is a given of being downloaded. Not sure about MTV downloads. I know it can support the MTV ap.