Will the MP4 have sound?

Yes. Video and audio are muxed into a single file, so it plays with sound immediately.

Which codecs are inside?

Usually H.264 video and AAC audio — the most compatible combination for an MP4 container.

Can I get WebM instead?

The tool targets MP4 for compatibility. Convert the file afterwards if you specifically need WebM.

Will it play on a TV?

Generally yes: MP4 with H.264 is supported by almost every TV with a USB port and by media players.

Why is the file bigger than expected?

Size follows resolution, length and how much motion the footage has. Pick a lower resolution for a compact file.

Can I download MP4 in 4K?

Yes, when the video is available in 4K. The option shows up in the quality list.

YouTube to MP4 converter

MP4 is the most compatible video format: it opens on phones, computers, TVs and in editing software. The file arrives as a ready MP4 with sound — no conversion needed.

Why MP4 is the practical format

MP4 is a container holding a video track (usually H.264) and audio (usually AAC). Practically every device of the last fifteen years understands that combination, so the file just opens on a double-click.

On YouTube, high-resolution video is stored separately from audio. The server downloads both tracks and muxes them into one MP4, so you get a normal file with sound instead of a silent video.

The alternative WebM container with VP9 or AV1 is smaller but far less compatible: older TVs, car players and some editors do not read it. That is why MP4 is the default here.

Never rename the extension by hand — it is unnecessary and harmful. The MP4 arrives ready; if a specific device needs another container, use a converter after downloading.

What MP4 gives you

Plays everywhere

Phone, tablet, laptop, TV, console, USB car stereo — nearly everything plays MP4.

Video and sound together

One file rather than separate tracks: nothing to mux or synchronise yourself.

Sensible size

H.264 compresses well, keeping files compact at good quality.

Editor-friendly

Imports into popular video editors with no preliminary conversion.

MP4 versus other formats

MP4 versus WebM: WebM is more efficient in size but noticeably less compatible. For a TV, an older tablet or a car, MP4 is the safer choice.

MP4 versus MP3: MP4 carries picture and sound, MP3 only sound. If you do not need the video, MP3 saves both space and data.

Size depends on resolution and length: ten minutes at 720p is typically tens of megabytes, the same at 4K several times more. Match the resolution to the screen you will watch on.

MP4 on a phone

The file opens in the stock player on Android and iOS:

1Copy the video link and paste it into the field on this page.
2Press Find video and pick an MP4 quality — 720p or 1080p suits a phone.
3Press Download and wait for it to finish.
4Open the file from Downloads: MP4 plays without installing extra players.

MP4 on a computer

Windows and macOS open the file with built-in tools:

1Paste the video link and press Find video.
2Choose a resolution: 1080p for viewing, higher for editing or a big screen.
3Save the file to your downloads folder.
4Open it in the built-in player or VLC, or import it into an editor directly.