youtube 'Play All' button

youtubeplayall.js

/***
Runs properly from either a video page (watch?v) or a channel page.
Source JS (copy and paste to devtools console)
Bookmarklet (select and drag to your bookmarks bar)
javascript:void%20function(){function%20a(b,c){var%20d;return%20Object.keys(b).some(function(e){return%20e===c%3F(d=b[e],!0):b[e]%26%26%22object%22==typeof%20b[e]%3F(d=a(b[e],c),void%200!==d):void%200}),d}var%20b=a(ytInitialData,%22browseId%22);window.location.replace(%22https://youtube.com/playlist%3Flist=%22+b.replace(%22UC%22,%22UU%22))}();
Because of the nature of how this code works, I've had it take me to the incorrect playlist a couple times in testing, but seemingly every time that happens, the second try works fine.
***/

function findVal(object, key) { // https://stackoverflow.com/a/40604638
    var value;
    Object.keys(object).some(function(k) {
        if (k === key) {
            value = object[k];
            return true;
        }
        if (object[k] && typeof object[k] === 'object') {
            value = findVal(object[k], key);
            return value !== undefined;
        }
    });
    return value;
}
var channelID = findVal(ytInitialData, 'browseId');
window.location.replace("https://youtube.com/playlist?list=" + channelID.replace("UC", "UU"));