ThirdTube /player Google Videos 403 Which Causes The FFMPEG Issue [Fix Included!]

I have a fork in which it is fixed, https://github.com/erievs/FourthTube

But here is the fix

How The Fix Works

So how ThirdTube works is it uses a decrypter and some base.js tomfoolery to access /player (without 403ing). The issue with this approach is, well, it breaks a lot. It was fine when the dev was active, but the dev has not.

However

We don't need that, we just need to send IOS YouTube app data, and it makes it happy (this is one of the methods YT-DLP uses)

std::string video_content = R"({"videoId": "%0", %1"context": {"client": {"hl": "%2","gl": "%3","clientName": "IOS","clientVersion": "19.29.1","deviceMake": "Apple","deviceModel": "19.29.1","osName": "iPhone","userAgent": "com.google.ios.youtube/19.29.1 (iPhone16,2; U; CPU iOS 17_5_1 like Mac OS X;)\"","osVersion": "17.5.1.21F90"}}, "playbackContext": {"contentPlaybackContext": {"signatureTimestamp": %4}}})";

Issue

This causes the metadata to breaks, thankfully we just have a separate post_content and video_content strings and use both for

 std::string json_str[2]; // {/next, /player}
        json_str[0] = http_post_json(urls[0], post_content).second;
        json_str[1] = http_post_json(urls[1], video_content).second;   /