diff --git a/README.md b/README.md
index d957283..13345f0 100644
--- a/README.md
+++ b/README.md
@@ -104,6 +104,7 @@ Native playback supports the returned proxy configuration and HLS query/segment-
 - SDR output only; HDR is not supported.
 - No embedded or YouTube captions, manual audio-track selection, rotation or deinterlacing. External WebVTT subtitles are supported for resolved streams.
 - yt-dlp support does not guarantee playback: extraction must yield HTTP(S)/HLS media without download-only fragment assembly. Audio-only results with explicit codec metadata are unsupported. Private, age-restricted, region-blocked or sign-in-required videos may fail; browser cookies are not used. Rebuild and reinstall for bundled extractor updates.
+- YouTube extraction uses IPv4 to avoid anti-bot failures on affected IPv6 routes. This does not bypass account or regional restrictions; other video sites retain their default network routing.
 - Seeking can be slow on long-GOP or unindexed media. Live streams cannot be sought, and expired stream URLs are not automatically refreshed.
 - Audio-device changes during playback are not handled.
 
diff --git a/Sources/App/YouTubeResolver.swift b/Sources/App/YouTubeResolver.swift
index dbec498..ea395b9 100644
--- a/Sources/App/YouTubeResolver.swift
+++ b/Sources/App/YouTubeResolver.swift
@@ -245,7 +245,7 @@ enum YouTubeResolver {
         environment["PATH"] = directories.joined(separator: ":")
         let transport = "[protocol~='^(https?|m3u8(_native)?)$']"
         let resolution = height.map { "[height=\($0)]" } ?? "[height<=?1080]"
-        let arguments = [
+        var arguments = [
             "--ignore-config", "--no-plugin-dirs", "--no-cache-dir", "--no-remote-components",
             "--no-playlist", "--simulate", "--skip-download", "--dump-single-json",
             "--no-progress", "--color", "never", "--no-check-formats",
@@ -253,8 +253,12 @@ enum YouTubeResolver {
             "--socket-timeout", "20", "--extractor-retries", "0", "--retries", "0",
             "--format-sort", "res", "--format-sort-force",
             "--format", "bestvideo*[dynamic_range=?SDR]\(resolution)\(transport)+bestaudio\(transport)/best[dynamic_range=?SDR]\(resolution)\(transport)",
-            "--", webpageURL.absoluteString
         ]
+        if webpageURL.host == "www.youtube.com" {
+            arguments.append("--force-ipv4")
+        }
+        arguments.append("--")
+        arguments.append(webpageURL.absoluteString)
         let output = try await YouTubeExtraction(executable: executable, arguments: arguments, environment: environment).run()
         try Task.checkCancellation()
         if let error = dependencyError(String(decoding: output.stderr, as: UTF8.self).lowercased()) {