subsite videos cannot play on ipad

It sounds like an incorrectly configured .htaccess file.

Translation from Marc, what is the content of your .htaccess file? ??

here is my .htaccess file:

# BEGIN WordPress
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?$blogname/files/(.+) wp-content/blogs.dir/$blog_id/files/$2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?stevenxu2/files/(.+) wp-content/blogs.dir/176/files/$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

# END WordPress

If I upload a file to media library, the file goes to /wp-content/blogs.dir/100/files/20.4/11/file

update: .htaccess file as following

# BEGIN WordPress
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

# END WordPress

If I upload a file to media library, the file goes to /wp-content/blogs.dir/100/files/20.4/11/file

You mean /wp-content/blogs.dir/100/files/2014/11/filename

Right? That’s normal and where it should load.

Did you delete these lines?

RewriteRule ^([_0-9a-zA-Z-]+/)?$blogname/files/(.+) wp-content/blogs.dir/$blog_id/files/$2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?stevenxu2/files/(.+) wp-content/blogs.dir/176/files/$2 [L]

If you were having to hard code those in, it may mean your site can’t handle the compelx htaccess rules.

@ipstenu (Mika Epstein)

yes, I mean /wp-content/blogs.dir/100/files/2014/11/filename.
and I deleted that two test RewritRules.
any idea why it cannot redirect to the right file location?

Funny thing…

“https://teachers.domain.com/user1/files/2014/11/video.m4v” isn’t wrong.

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

That line in your .htaccess is supposed to tell the browser that the URLs with /files/ really go somewhere else. When that doesn’t work, it’s usually because your server doesn’t understand the complex .htaccess rules.

Can you check if your httpd.conf file has AllowOverride set to “All” or “Options All”

“https://teachers.domain.com/user1/files/2014/11/video.m4v”
this link works on computers’ browser, but not for iPad,any different between them?

I don’t have http.conf file, only apache2.conf. all “AllowOverride” in apache2.conf have set to All.

There really shouldn’t be a difference between ipad and a grown up computer.

Have you flushed Safari’s cache on the ipad?

Yes, I flushed the Safari cache on ipad, and try google chrome on ipad, the same problem.

Does your site use a different theme on mobile devices, or is the theme responsive?

Thanks Mika
my site use the same theme on ipad.

I’ve told the users to edit the embed video code to make the video works on iPad. it may not be the best way, but this method helped.

If you go to the ‘bad’ URL directly on the ipad, what happens?

If I go to https://teachers.domain.com/user1/files/2014/11/video.m4v on ipad browser, the opened page is black with a play button in the middle. and one disabled symbol on the play button.

If I go to https://teachers.domain.com/wp-content/blogs.dir/100/files/2014/11/video.m4v, I opened the video page,video can play normal.

Something’s being restricted on the server side. You’ll have to delve into your server’s PHP error logs ??