YouTube to MP4

You searched youtube to mp4. The usual result is a converter you found in search: paste the link, click through a second download page, and still may not know where the file went.

KeepCopy is a desktop video downloader, not a website that converts the video for you. To do YouTube to MP4 here, paste a YouTube watch, youtu.be, or Shorts link, pick 720p MP4, 1080p MP4, or 4K MP4, and save the video to a folder on this computer. Official yt-dlp plus ffmpeg run locally. The pasted URL never goes through our servers.

On this page

• Why YouTube-to-MP4 usually means a converter
• Paste a YouTube watch, youtu.be, or Shorts link
• YouTube splits picture and sound
• How to do YouTube to MP4 in KeepCopy
• When YouTube asks you to sign in
• A YouTube playlist
• If you wanted audio only
• Micro-FAQ

Why YouTube-to-MP4 usually means a converter

The search is built for a paste box on someone else’s site. You copy a YouTube URL, land on a converter, and wait for a file that may be 360p, silent, or wrapped in ads.

A browser extension is another approach, with its own permissions and data handling. KeepCopy runs as a separate desktop app.

KeepCopy stays a desktop video downloader. This page is only the YouTube-as-MP4 job. You paste the link. The app inspects it on this computer. You pick a plain MP4 preset. The file lands in a folder you choose.

The generic “no converter in the middle” write-up is Save web video without a web converter. A page that is not a video host — an article or course URL with a player — is Download embedded video. Everyday 1080p on any host is Download 1080p video without command line. A Facebook Watch or Reel is Facebook to MP4. An Instagram Reel or video post is Instagram to MP4. A TikTok video or share link is TikTok to MP4. An X /status/ post is How to download an X video as MP4. Come back here when the link is YouTube.

Paste a YouTube watch, youtu.be, or Shorts link

Paste the video page you opened, not the YouTube homepage.

• A watch URL looks like youtube.com/watch?v= plus an id.
• A share URL looks like youtu.be/ plus the same id.
• A Short looks like youtube.com/shorts/ plus an id. That is still one video. It is not a different product.

A live or premiere URL is not this page while inspect still warns. Wait for the replay — Download YouTube live stream.

Copy from the address bar or Share → Copy link. Do not paste a channel, a search page, or YouTube’s home. Those are not one video. Check the preview before downloading; the engine may return a list, a different video, or an error.

A playlist URL is a list. Inspect it and select the entries you want — Download selected videos from a playlist. A generated Mix is Download YouTube Mix.

YouTube splits picture and sound

YouTube often stores sharper video and audio as two streams. The page mixes them while you watch. A file on disk does not, unless something on this computer joins them.

That join is ffmpeg. First launch installs it next to the official yt-dlp release. Every video preset can use that join, including 720p MP4 and best available. A smaller combined stream can already contain both picture and sound.

The generic mute diagnostic is Downloaded MP4 no audio. This page stays on YouTube: paste a watch or Shorts link, get one MP4 with sound.

How to do YouTube to MP4 in KeepCopy

Paste the YouTube link, pick an MP4 preset, set the folder, and queue the job. You never type a format code.

Step 1: Open KeepCopy

Launch KeepCopy on macOS or Windows. Linux is coming soon. First run installs and verifies the official yt-dlp release and ffmpeg on this computer. You do not hunt a package manager.

Step 2: Paste the YouTube URL

Drop in the watch, youtu.be, or Shorts link. The app inspects it on this computer before anything is saved. You should see that video’s title.

Step 3: Pick 720p, 1080p, or 4K MP4

Choose 720p MP4, 1080p MP4, 4K MP4, or best available when the source has them. Watch later is a shortcut for those everyday presets.

Pick 1080p or 4K for higher resolution when available, not to enable sound. 720p and best available can also include audio.

If Audio language appears, pick (original) or a listed track. One language per download. A file that plays the wrong voice is Downloaded video has auto-dubbed audio.

Step 4: Save it to a folder

In Settings, set Save files to to a folder on this computer. The queue shows progress, cancel, and retry. When it finishes, Show folder reveals the video.

The MP4 labels are presets, not a guarantee of the final container. KeepCopy requests MP4 when joining separate streams. A source that needs no join can keep its original container, and codec compatibility depends on your player. Check the saved file if you specifically need MP4.

KeepCopy

No telemetry. No account. The video stays on this computer.

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When YouTube asks you to sign in

A public YouTube video usually downloads without cookies. Start with Don’t use cookies.

Age-restricted and members-only videos can play in a signed-in browser and still challenge the download. If the title is sign in required or YouTube is asking for verification, open Site access. Choose cookies from Chrome, Chromium, Brave, Edge, Firefox, or Safari, or a cookies.txt file. Then press Add again and queue a new download with that cookie choice.

KeepCopy reads cookies locally and yt-dlp sends applicable cookies to the host, never through our servers. They reuse a session you already have. They do not create an account with us. The full path is Video download says sign in required.

A YouTube playlist

A YouTube playlist URL is still select-then-save. Inspect the list, pick the entries, queue those.

Watch Later is a private list=WL playlist and needs cookies — Download YouTube Watch Later.

The app does not silently download every item. The screenshot of that picker is on the playlist post. This page stays one YouTube video at a time unless you selected more than one.

If you wanted audio only

MP4 presets keep the picture. If you wanted the soundtrack and not the video, that job is YouTube to MP3. Open Audio and pick audio MP3.

The download stays local-first. Your computer talks to YouTube. The desktop app sends no telemetry. For the path of a pasted link, read What stays on your computer. If the queue failed, Video download keeps failing. More workflow notes live with this one.

Micro-FAQ

Which YouTube URL do I paste?

Paste the watch page, a youtu.be short link, or a Shorts URL. Not the YouTube homepage, a channel page, or a search results page.

Why pick 1080p or 4K instead of a tiny file?

Choose 1080p or 4K for more detail when the source offers it. All video presets can include sound and join separate streams with ffmpeg. A low resolution does not mean audio is missing.

Is KeepCopy a website that converts the video?

No. It is a desktop video downloader. A pasted YouTube URL goes from this computer to YouTube — never through our servers.

What if YouTube asks for a sign-in?

If the title is sign in required or YouTube is asking for verification, choose cookies from a listed browser or a cookies.txt file. KeepCopy reads cookies locally and yt-dlp sends applicable cookies to the host, never through our servers.