The same issue just started to appear with Chrome's dark mode (for some strange reason) and this was the only thread that I could find on the issue. The Tampermonkey script works but its intermittent and sometimes it doesn't remove the white filter.

Here's an improved script for Tampermoney:

// ==UserScript==
// @name        Chrome Force Dark Mode Fix/White Overlay Fix
// @namespace   namespace
// @include     *://www.youtube*
// @description Fixes Chrome Force Dark Mode on YouTube
// @grant       GM_addStyle
// @require  http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
// @require  https://gist.github.com/raw/2625891/waitForKeyElements.js
// ==/UserScript==
waitForKeyElements (".ytp-gradient-bottom", removeDSclass);

function removeDSclass (jNode) {
    jNode.removeClass ("ytp-gradient-bottom");
}

Here's the final improved version:

// ==UserScript==
// @name        Chrome Force Dark Mode Fix/White Overlay Fix
// @namespace   namespace
// @include     *://www.youtube*
// @description Fixes Chrome Force Dark Mode on YouTube
// @grant       GM_addStyle
// @grant       GM.getValue
// @require  http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
// @require  https://gist.github.com/raw/2625891/waitForKeyElements.js
// ==/UserScript==
waitForKeyElements ("div.ytp-gradient-bottom, div.ytp-gradient-top", removeNode);

function removeNode (jNode) {
    jNode.remove ();
}

Here's the final improved version:

// ==UserScript==
// @name        Chrome Force Dark Mode Fix/White Overlay Fix
// @namespace   namespace
// @include     *://www.youtube*
// @description Fixes Chrome Force Dark Mode on YouTube
// @grant       GM_addStyle
// @grant       GM.getValue
// @require  http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
// @require  https://gist.github.com/raw/2625891/waitForKeyElements.js
// ==/UserScript==
waitForKeyElements ("div.ytp-gradient-bottom, div.ytp-gradient-top", removeNode);

function removeNode (jNode) {
    jNode.remove ();
}

The same issue just started to appear with Chrome's dark mode (for some strange reason) and this was the only thread that I could find on the issue. The Tampermonkey script works but its intermittent and sometimes it doesn't remove the white filter.

Here's an improved script for Tampermoney:

// ==UserScript==
// @name        Chrome Force Dark Mode Fix/White Overlay Fix
// @namespace   namespace
// @include     *://www.youtube*
// @description Fixes Chrome Force Dark Mode on YouTube
// @grant       GM_addStyle
// @require  http://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js
// @require  https://gist.github.com/raw/2625891/waitForKeyElements.js
// ==/UserScript==
waitForKeyElements (".ytp-gradient-bottom", removeDSclass);

function removeDSclass (jNode) {
    jNode.removeClass ("ytp-gradient-bottom");
}