[Desktop] Repurpose the global autoplay content setting so that it allows overriding the Chrome policy

[pes10k]

Background: Previously Brave had its own autoplay system, based on a list, b/c Chrome's autoplay policy was crummy. Now Chrome's policy is a lot better than it was, so Brave has removed its custom system and just falls back on Chrome's (#9597, brave/brave-core#5970, etc).

However, we still have the global "autoplay" content setting as a vestigial hold over from the previous system. We should use it to allow users to still disable autoplay, if they don't like Chrome's new-and-improved system.

[pes10k]

If we don't do this, we should remove the autoplay content setting, to avoid confusion

[pes10k]

FWIW, this is the autoplay content setting referred to above

[timkgh]

Always block is very valuable. Please make it work instead of removing it.

[pes10k]

Thanks @timkgh. Its useful for us to get a sense of this, so we know what to prioritize. No promises on a final decision, since theres a lot of high priority things on our plate, but its useful to know that its a feature folks would use

[umbraesoulsbane]

Just chiming in on this. This is a critical feature for me. Since this became an issue in Brave I have switched to Chrome Edge. I prefer Brave (especially mobile) but the lack of zero autoplay I only use it for a handful of cases.

[bsclifton]

+1 from several users in #9597

Per @darkdh in #9597 (comment)

Just verified

per site autoplay setting works

global autoplay setting doesn't work
issue tracked here
(#10807)

[pes10k]

There are three related issues here:

1. The text incorrect on the global toggle: [Desktop] Description of default setting for autoplay is incorrect (says "ask") #10810
2. The global setting doesn't seem to apply in most cases, for most users: [Desktop] Repurpose the global autoplay content setting so that it allows overriding the Chrome policy #10807
3. For some users / profiles, the site specific setting doesn't work (my profile, for example): Site-specific autoplay settings are not respected for some profiles #10811

[wolfiejunk]

Agree with others that global autoplay off should be available and easy to access. It is for us a very high value problem and we find ourselves more and more migrating away from Brave. Simply... Global Autoplay Off Yes/No

[btlechowski]

Verification passed on

Brave	1.13.71 Chromium: 84.0.4147.125 (Official Build) dev (64-bit)
Revision	d0784639447f2e10d32ebaf9861092b20cfde286-refs/branch-heads/4147@{#1059}
OS	Ubuntu 18.04 LTS

Verified test plan from brave/brave-core#6130

Autoplay default setting options
Allowed

Blocked

Verified Polish translation

Autoplay set default block
Video is blocked

Autoplay default allow
Video is player

Autoplay blocked through the block list
Video is blocked

---

Verified passed with

Brave | 1.13.79 Chromium: 85.0.4183.69 (Official Build) dev (64-bit)
-- | --
Revision | 4554ea1a1171bd8d06951a4b7d9336afe6c59967-refs/branch-heads/4183@{#1426}
OS | macOS Version 10.14.6 (Build 18G3020)

Verified test plan from brave/brave-core#6130

Autoplay default setting options
Allowed

Blocked

Autoplay set default = Blocked
Video is blocked

Autoplay set default = Allowed
Video plays automatically

Autoplay blocked on a per site basis
Video is blocked

---

Verification passed on

Brave | 1.13.79 Chromium: 85.0.4183.69 (Official Build) dev (64-bit)
-- | --
Revision | 4554ea1a1171bd8d06951a4b7d9336afe6c59967-refs/branch-heads/4183@{#1426}
OS | Windows 10 OS Version 1903 (Build 18362.1016)

• Verified the test plan from Autoplay default content setting value brave-core#6130

Autoplay default setting options

• Verified Autoplay option is "Allowed" when toggle is ON in brave://settings/content/autoplay
  
• Verified Autoplay option is "Blocked" when toggle is OFF in brave://settings/content/autoplay
  

Autoplay set default block

• Verified video is not autoplay when autoplay option is "Blocked" in brave://settings/content/autoplay
  

Autoplay default allow

• Verified video is autoplay when the default option is set to "Allowed"
  
• Verified video is not autoplay when cnn.com is added to "Blocked" list through brave://settings/content/siteDetails?site=https%3A%2F%2Fwww.cnet.com
  

[hennrynusasatria]

Hi @btlechowski

This Autoplay blocker does not work on this site:

https://inet.detik.com/security/d-5149755/sering-dibobol-ini-pembelaan-whatsapp?tag_from=wp_beritautama

I have turned the Global Autoplay Content Setting to "Blocked", but the video keeps autoplaying on the above site, can you help to check?

Thank you.