Why MP4?
MP4 is the format every device understands: phones, tablets, laptops, smart TVs, video editors and messaging apps. Youtube4DL delivers YouTube videos as standard MP4 files with the picture and sound already combined, so they play everywhere without extra software.
Original quality, no re-encoding
YouTube keeps HD video and audio as separate streams. Some downloaders re-encode them, which takes time and lowers quality. Youtube4DL copies both streams into one MP4 as they are, so what you download is exactly what YouTube serves, without a watermark.
Choosing a resolution
| Resolution | Approx. size per 10 minutes | Best for |
|---|---|---|
| 360p | 20–40 MB | Small phones, saving data |
| 720p HD | 50–120 MB | Phones and tablets |
| 1080p Full HD | 100–250 MB | Laptops, TVs, editing |
| 2160p 4K | 400 MB – 1.5 GB | 4K TVs and monitors |
Sizes vary with the video: fast-moving scenes and 60 fps videos are larger than slides or talking heads.
360p downloads are resumable
The 360p format is a single file on YouTube’s side, so Youtube4DL can show its exact size and your browser or download manager can pause and resume it. Higher qualities are combined live, which means they start instantly but can’t be resumed after a disconnection.