It's worth noting that when he says the NES had a limit of 64 sprites the limit is 64 per screen not 64 total. Each being 8x8 pixels in size. There was another

It's worth noting that when he says the NES had a limit of 64 sprites the limit is 64 per screen not 64 total. Each being 8x8 pixels in size. There was another limitation though, you could only have 8 sprites displayed on the same horizontal line (scanline). Games got around this by "flickering" the sprites so it would appear that more were displayed at once.