A few months ago I just wanted to save one YouTube video. What followed was the usual circus: a site with three "Download" buttons (two were ads), a pop-under, a fake virus warning, and a quiet little cap at 720p unless I "upgraded." I closed the tab feeling like I needed to scan my laptop.
So I built the thing I actually wanted. It's called VidSnag, it's free, it's open source, and it does exactly one job without trying to trick you. I want to share how it works, because the architecture is the whole reason it can stay clean.
The core idea: do the download on the user's machine
Most "online downloaders" run the download on their server, then hand you the file. That server costs money, so the page around it gets monetized with ads, and ads are where all the pop-ups and fake buttons come from. It is the business model leaking onto your screen.
VidSnag flips that. It is a small desktop app, so the download happens on your own computer. There is no webpage in the middle, nothing to monetize, and nothing gets uploaded to a stranger's server. No ad page means no pop-ups, by design rather than by promise.
The stack
It is deliberately boring, which is a compliment:
yt-dlp does the heavy lifting. It is the open-source engine that knows how to extract media from YouTube and around 1,800 other sites.
pywebview + WebView2 renders the UI: plain HTML and CSS in a native window using the WebView2 runtime that already ships with Windows. No bundled Chromium, so the app stays smaller.
ffmpeg is bundled for merging streams and MP3 extraction.
PyInstaller packs it into a single Windows .exe.
The app makes zero network calls for its own UI. The only traffic it ever generates is the actual download you asked for.
The part nobody warns you about: SmartScreen
When you ship a new, unsigned Windows .exe, SmartScreen shows a scary "not commonly downloaded" banner. I assumed I had done something wrong. I had not. That banner is about reputation, not malware. It says nothing about whether the file is safe.
Since I could not buy instant reputation, I made the app trivially verifiable: the full source is on GitHub, every release ships with a published SHA-256 checksum, and the build has a clean VirusTotal scan. If you do not want to trust me, you do not have to. Read the code and check the file.
What it does
Paste a link, pick a quality up to 4K (or MP3 for audio), choose a folder, download. Single videos, whole playlists, and batches. No account, no sign-up, no nag screen. Funded by optional donations instead of ads.
Try it or read it
- Site:
If you have ever rage-closed a downloader site, this is my attempt to make that unnecessary. Feedback and PRs welcome. If you have shipped an unsigned Windows app and have a better answer to the SmartScreen reputation problem than "wait and publish a checksum," I would love to hear it.
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