videos are blocky/pixelated in dark scenes?

i think its caused by the video compression. it makes solid colors into blocks of pixels instead of individual pixels to make the size of the video smaller but also gives it that terrible blocky look.
 


do you know a solution to it?
 


there is not really anything you can do if it's like a dvd or something, if it is a streaming video then raising the video quality should help reduce it but might not take it all away.