Все потому что у вас поздний клон сега, выпущенный после 2002 года, естественно такие клоны сеги являются дерьмом, не заслуживающего внимания.
Chinese clones of the Sega console were very diverse both externally and internally, early versions from the 90s of the last century were on larger boards, often had RGB and stereo outputs and a working port - mega CD. But they are still produced, although they are similar in appearance, internally they are of a completely different quality and size of the board.
Therefore, what you saw in the video is a rare thing; collectors are looking for them in Russia. What you bought - you could go buy it at any time, in any video game store in Russia.