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Add new age-gate bypass
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The account proxy remains as a fallback.
Source: yt-dlp/yt-dlp#574 (comment)
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@zerodytrash
zerodytrash committed Jul 27, 2021
1 parent e75e72f commit fd96e62
Showing 1 changed file with 54 additions and 19 deletions.
73 changes: 54 additions & 19 deletions Simple-YouTube-Age-Restriction-Bypass.user.js
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// ==UserScript==
// @name Simple YouTube Age Restriction Bypass
// @name:de Simple YouTube Age Restriction Bypass
// @version 2.0.1
// @version 2.0.2
// @description View age restricted videos on YouTube without verification and login :)
// @description:de Schaue YouTube Videos mit Altersbeschränkungen ohne Anmeldung und ohne dein Alter zu bestätigen :)
// @author ZerodyOne (https://github.com/zerodytrash)
// @author Zerody (https://github.com/zerodytrash)
// @namespace https://github.com/zerodytrash/Simple-YouTube-Age-Restriction-Bypass/
// @updateURL https://github.com/zerodytrash/Simple-YouTube-Age-Restriction-Bypass/raw/main/Simple-YouTube-Age-Restriction-Bypass.user.js
// @downloadURL https://github.com/zerodytrash/Simple-YouTube-Age-Restriction-Bypass/raw/main/Simple-YouTube-Age-Restriction-Bypass.user.js
Expand All @@ -23,10 +23,12 @@
var wrappedPlayerResponse = null;
var unlockablePlayerStates = ["AGE_VERIFICATION_REQUIRED", "LOGIN_REQUIRED", "UNPLAYABLE"];
var playerResponsePropertyAliases = ["ytInitialPlayerResponse", "playerResponse"];
var lastUnlockedGoogleVideoUrlParams = null;
var innertubeApiKey = "AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8";
var lastProxiedGoogleVideoUrlParams = null;
var responseCache = {};

// Proxy configuration.
// The following proxies are currently used as fallback if the innertube age-gate bypass doesn't work...
// You can host your own account proxy instance. See https://github.com/zerodytrash/Simple-YouTube-Age-Restriction-Bypass/tree/main/account-proxy
var accountProxyServerHost = "https://youtube-proxy.zerody.one";
var videoProxyServerHost = "https://phx.4everproxy.com";

Expand Down Expand Up @@ -67,11 +69,12 @@
// Intercept XMLHttpRequest.open to rewrite video url's
XMLHttpRequest.prototype.open = function () {

if (arguments.length > 1 && arguments[1] && arguments[1].indexOf("https://") === 0) {
if (arguments.length > 1 && typeof arguments[1] === "string" && arguments[1].indexOf("https://") === 0) {
var method = arguments[0];
var url = new URL(arguments[1]);
var urlParams = new URLSearchParams(url.search);

// if the account proxy was used to retieve the video info, the following applies:
// some video files (mostly music videos) can only be accessed from IPs in the same country as the innertube api request (/youtubei/v1/player) was made.
// to get around this, the googlevideo url will be replaced with a web-proxy url in the same country (US).
// this is only required if the "gcr=[countrycode]" flag is set in the googlevideo-url...
Expand All @@ -85,7 +88,7 @@
}

function isUnlockedByAccountProxy() {
return urlParams.get("id") !== null && lastUnlockedGoogleVideoUrlParams && urlParams.get("id") === lastUnlockedGoogleVideoUrlParams.get("id");
return urlParams.get("id") !== null && lastProxiedGoogleVideoUrlParams && urlParams.get("id") === lastProxiedGoogleVideoUrlParams.get("id");
}

if (videoProxyServerHost && isGoogleVideo() && hasGcrFlag() && isUnlockedByAccountProxy()) {
Expand Down Expand Up @@ -152,38 +155,57 @@

var unlockedPayerResponse = getUnlockedPlayerResponse(videoId, reason);

// account proxy error?
if (unlockedPayerResponse.errorMessage)
throw ("Simple-YouTube-Age-Restriction-Bypass: Unlock Failed, errorMessage: " + unlockedPayerResponse.errorMessage);

// check if the unlocked response isn't playable
if (unlockedPayerResponse.playabilityStatus.status !== "OK")
throw ("Simple-YouTube-Age-Restriction-Bypass: Unlock Failed, playabilityStatus: " + unlockedPayerResponse.playabilityStatus.status);

// store the url params from the url- or signatureCipher-attribute to detect later if the requested video files are from this unlock. => see isUnlockedByAccountProxy()
if (unlockedPayerResponse.streamingData?.adaptiveFormats) {
// if the video info was retrieved via proxy, store the url params from the url- or signatureCipher-attribute to detect later if the requested video files are from this unlock.
// => see isUnlockedByAccountProxy()
if (unlockedPayerResponse.proxied && unlockedPayerResponse.streamingData?.adaptiveFormats) {
var videoUrl = unlockedPayerResponse.streamingData.adaptiveFormats.find(x => x.url)?.url;
var cipherText = unlockedPayerResponse.streamingData.adaptiveFormats.find(x => x.signatureCipher)?.signatureCipher;

if (cipherText) {
videoUrl = new URLSearchParams(cipherText).get("url");
}
if (cipherText) videoUrl = new URLSearchParams(cipherText).get("url");

lastUnlockedGoogleVideoUrlParams = videoUrl ? new URLSearchParams(new URL(videoUrl).search) : null;
lastProxiedGoogleVideoUrlParams = videoUrl ? new URLSearchParams(new URL(videoUrl).search) : null;
}

return unlockedPayerResponse;
}

function getUnlockedPlayerResponse(videoId, reason) {

// Check if is cached
// Check if response is cached
if (responseCache.videoId === videoId) return responseCache.content;

// Query YT's unrestricted api endpoint
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("GET", accountProxyServerHost + "/getPlayer?videoId=" + encodeURIComponent(videoId) + "&reason=" + encodeURIComponent(reason), false); // Synchronous!!!
xmlhttp.send(null);
var playerResponse = nativeParse(xmlhttp.responseText);
var playerResponse = null;

// Strategy 1: Retrieve the video info by using a age-gate bypass for the innertube api
// Source: https://github.com/yt-dlp/yt-dlp/issues/574#issuecomment-887171136
function useInnertubeEmbed() {
var payload = getInnertubeEmbedPlayerPayload(videoId);
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("POST", "/youtubei/v1/player?key=" + innertubeApiKey, false); // Synchronous!!!
xmlhttp.send(JSON.stringify(payload));
playerResponse = nativeParse(xmlhttp.responseText);
}

// Strategy 2: Retrieve the video info from an account proxy server.
// See https://github.com/zerodytrash/Simple-YouTube-Age-Restriction-Bypass/tree/main/account-proxy
function useProxy() {
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("GET", accountProxyServerHost + "/getPlayer?videoId=" + encodeURIComponent(videoId) + "&reason=" + encodeURIComponent(reason), false); // Synchronous!!!
xmlhttp.send(null);
playerResponse = nativeParse(xmlhttp.responseText);
playerResponse.proxied = true;
}

if (playerResponse?.playabilityStatus?.status !== "OK") useInnertubeEmbed();
if (playerResponse?.playabilityStatus?.status !== "OK") useProxy();

// Cache response for 10 seconds
responseCache = { videoId: videoId, content: playerResponse };
Expand All @@ -192,6 +214,19 @@
return playerResponse;
}

function getInnertubeEmbedPlayerPayload(videoId) {
return {
"context": {
"client": {
"clientName": "WEB",
"clientVersion": "2.20210721.00.00",
"clientScreen": "EMBED"
}
},
"videoId": videoId
}
}

// Some extensions like AdBlock override the Object.defineProperty function to prevent a re-definition of the 'ytInitialPlayerResponse' variable by YouTube.
// But we need to define a custom descriptor to that variable to intercept his value. This behavior causes a race condition depending on the execution order with this script :(
// This function tries to restore the native Object.defineProperty function...
Expand Down Expand Up @@ -222,4 +257,4 @@
}
}

})();
})();

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