Ads displaying on YouTube even with Shields Enabled

[elaine-jackson]

Description

Even with Brave Shields enabled ads are showing up on YouTube

Steps to Reproduce

1. Visit https://www.youtube.com/watch?v=J1Fxl4cGVd4 with shields enable
2. Scroll down
3. See advertisements

Actual result:

Expected result:

YouTube to load without ads.

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave	1.4.96 Chromium: 80.0.3987.132 (Official Build) (64-bit)
Revision	fcea73228632975e052eb90fcf6cd1752d3b42b4-refs/branch-heads/3987@{#974}
OS	Linux
JavaScript	V8 8.0.426.26
Flash	(Disabled)
User Agent	Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36
Command Line	/opt/brave.com/brave/brave --enable-dom-distiller --disable-domain-reliability --no-pings --extension-content-verification=enforce_strict --extensions-install-verification=enforce --sync-url=https://no-thanks.invalid --enable-features=PasswordImport,WebUIDarkMode,SimplifyHttpsIndicator --disable-features=AutofillServerCommunication,AllowPopupsDuringPageUnload,VideoPlaybackQuality,WebXrGamepadModule,NotificationTriggers,SmsReceiver,AudioServiceOutOfProcess,LookalikeUrlNavigationSuggestionsUI,WebXR --flag-switches-begin --flag-switches-end --disable-webrtc-apm-in-audio-service --disable-sync
Executable Path	/opt/brave.com/brave/brave
Profile Path	/home/nathaniel/.config/BraveSoftware/Brave-Browser/Default

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the dev channel?
• Can you reproduce this issue with the nightly channel?

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

[ghost]

Unable to reproduce on Brave Nightly latest version (may already be patched in nightly but not in beta or stable)

Brave	1.8.25 Chromium: 80.0.3987.149 (Official Build) nightly (64-bit)
Revision	5f4eb224680e5d7dca88504586e9fd951840cac6-refs/branch-heads/3987_137@{#16}
OS	Windows 10 OS Version 1909 (Build 18363.720)
JavaScript	V8 8.0.426.27
Flash	(Disabled)
User Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36
Command Line	"C:\Users\Fred\AppData\Local\BraveSoftware\Brave-Browser-Nightly\Application\brave.exe" --enable-dom-distiller --disable-domain-reliability --no-pings --extension-content-verification=enforce_strict --extensions-install-verification=enforce --sync-url=https://no-thanks.invalid --enable-features=PasswordImport,DnsOverHttps,MixedContentSiteSetting,SimplifyHttpsIndicator,PassiveMixedContentWarning,AutoupgradeMixedContent,WebUIDarkMode --disable-features=AutofillServerCommunication,AllowPopupsDuringPageUnload,NotificationTriggers,SmsReceiver,AudioServiceOutOfProcess,LookalikeUrlNavigationSuggestionsUI,VideoPlaybackQuality --flag-switches-begin --flag-switches-end --enable-audio-service-sandbox --disable-webrtc-apm-in-audio-service --disable-sync
Executable Path	C:\Users\Fred\AppData\Local\BraveSoftware\Brave-Browser-Nightly\Application\brave.exe
Profile Path	C:\Users\Fred\AppData\Local\BraveSoftware\Brave-Browser-Nightly\User Data\Default
Variations	5e3a236d-59e286d0

[rebron]

Closing as dupe of #3348
@irlcatgirl Will add a +1 for you #3348.