In order to be able to download videos from mtv (no matter the country and various other sites of their network) we need the mgid.
One of the easiest ways is the following:
For com https://www.mtv.com/feeds/triforce/manifest/v8?url=http%3A%2F%2Fwww.mtv.com%2Fepisodes%2F4iqsts%2Frevenge-prank-the-prank-that-hits-the-jackpot-season-1-ep-16
For de https://www.mtv.de/feeds/triforce/manifest/v8?url=http%3A%2F%2Fwww.mtv.de%2Ffolgen%2Fhxzmi4%2Fgeordie-shore-die-neue-chloe-S21-F7 and so on.
Note that url=http (!) if you try to use https it won't work for now but MTV is about to change their system to using https.