MP3 vs. MP4: Which Format Should You Choose?
A clear breakdown of MP3 versus MP4 for downloading YouTube content — quality, file size, device compatibility, and how to pick the right one for music, podcasts and videos.
When you start a YouTube download, the first decision is the format: MP3 or MP4. The labels are misleading because they describe two different things — one is audio-only, the other carries audio and video together. Here is the practical breakdown so you pick the right one without thinking about it twice.
The short answer
- MP3 when you only need the sound — music, podcasts, audiobooks, lectures, sermons, interviews.
- MP4 when you need to see the picture — music videos, tutorials, dance choreography, gameplay highlights, anything visual.
What MP3 actually is
MP3 is an audio compression format. It strips the video stream entirely and keeps only the soundtrack, compressed at a bitrate of your choice. A typical 3-minute song at 128 kbps lands at about 3 MB; at 320 kbps it's closer to 7 MB. The format works everywhere: every phone, every car stereo, every streaming app, every smart speaker.
MP3 is the right choice when you don't care about the picture. Putting an MP3 of a podcast on your phone takes a fraction of the space of the video version and plays in any audio app.
What MP4 actually is
MP4 is a container format that holds video and audio together. The video is usually H.264 or H.265 encoded, the audio AAC. It plays natively on iOS, macOS, Windows, Android, smart TVs, and inside almost every browser without any plugin. File sizes are much larger than MP3 — expect 30-100 MB for a typical 3-minute 1080p music video.
MP4 is the right choice when you actually need the visuals. A workout routine, a tutorial, a music video where the choreography matters — these all lose half their value as MP3.
Side-by-side comparison
- Audio quality: Effectively the same at matching bitrates. Both formats use lossy compression. MP3 at 320 kbps and MP4 audio at 256 kbps AAC are indistinguishable to almost every listener.
- File size: MP3 is dramatically smaller — roughly 5-10× depending on the video resolution.
- Device compatibility: Both are universal. MP3 has the edge on legacy car stereos; MP4 has the edge for smart TVs and projectors.
- Editability: Easier to chop, tag and metadata-edit MP3 (audio-only) than MP4 (multi-stream).
- Battery use on mobile: MP3 playback uses less CPU than decoding MP4 video, so headphone-only listening saves battery.
Common mistakes
- Downloading a music video as MP3 when you wanted the video. Always sanity-check the format toggle before clicking download.
- Downloading a podcast as MP4 because the page shows a static thumbnail anyway. You just wasted 80% of the file size on nothing useful.
- Picking 320 kbps for spoken-word content. Voice peaks around 4-8 kHz; you cannot hear the difference between 128 and 320 kbps for a podcast. Save the bandwidth.
How to choose at the download screen
On the TubeGalore video page, the format toggle is the first control. Pick the one that matches the table above, choose a sensible quality, and click Download. If you change your mind after one format is ready, the "Convert Different Format" button kicks off a fresh conversion in the other format without losing your place.