: Many white-label or budget electronics (like mini projectors, car stereos, or MP3 players) use strings like "4020" in their model numbers and boast MP4 playback as a primary feature.
If you are asking about the benefits of using the container format itself for your media, its key advantages include: 4020mp4
: If you are looking at a file named 4020.mp4 , its "good features" will depend entirely on its resolution, bitrate, and content. : Many white-label or budget electronics (like mini
: Widely supported by online video platforms like YouTube and various social media networks. 4020mp4