This seems to be related to the new auto play policy in M64.

Opening a file locally seems like a valid user gesture and things should just start playing.

Assigning to +beccahughes is this behavior expected or is this a bug?

becca does autoplay intentionally not work on local media?

dahlke@, I take it you are fine with this? :)

beccahughes@, to fix this, you would need to change the settings of the document in https://cs.chromium.org/chromium/src/third_party/WebKit/Source/core/html/media/MediaDocument.cpp?q=f:mediadocument.cpp&sq=package:chromium&l=1

I can also take the bug if you are too busy with other things.

Yes, I think local media files should autoplay.

I cannot reproduce this on Linux in 65.0.3299.0 so I will try some different versions.

I tried again in 64.3282.24 Linux and Mac and cannot reproduce this issue. @dbbrooks are you still experiencing this issue?

With unified autoplay enabled it does not autoplay so this could be that.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/01500748689e19f3219c1b63def397fc395dbf4a

commit 01500748689e19f3219c1b63def397fc395dbf4a
Author: Becca Hughes <beccahughes@chromium.org>
Date: Mon Dec 18 14:35:08 2017

Autoplay: local files should always play

Local files should always have autoplay.

BUG= 794294 

Change-Id: I3d2d302dc7e9476f5a694f2211986e6858714d1d
Reviewed-on: https://chromium-review.googlesource.com/831986
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524704}
[add] https://crrev.com/01500748689e19f3219c1b63def397fc395dbf4a/third_party/WebKit/LayoutTests/media/autoplay/media-document-autoplay-enabled.html
[modify] https://crrev.com/01500748689e19f3219c1b63def397fc395dbf4a/third_party/WebKit/Source/core/html/media/MediaDocument.cpp

 Issue 794778  has been merged into this issue.

Verified on 10176.35.0/64.0.3282.65 and 10271.0.0/65.0.3299.0