In Dolphin 7.2 countries list is already alphabetically sorted, so the order you set in the predefined values doesn't matter. It is made this way to have countries to be alphabetically sorted in different languages.

If your site has one language installed and you want some special order for the countries then change the following line in templates/base/scripts/BxBaseConfig.php file:

    var $bForceSortCountries = false;

After this modification you can set your own order for the countries list in Admin Panel > Builders > Predefined Values > Country

it can be, but it will not work. There are too many cities to manage them in predefined values and many other complications. It's better to use some geo-database or geo-service for this. There are some 3rd-party mods for this in the market.

Actually "Maximum number of processing files" setting means that it will process up to 2 files per one run.

Dolphin runs video processing every 5 minutes (via cron jobs).

The problem maybe with big video files, if they are processing longer than 5 minutes:

for example you uploaded 5 big video files and processing of one file takes approximately 15 minutes, and cron runs every 5 minutes:

- after 1st cron run you will 2 files in processing and 3 files are pending processing

- after 2nd cron run (after 5 minutes) you will have 4 files processing and 1 file pending processing

- after 3rd cron run (after 10 minutes) you will have 5 files processing and 0 files pending

- then after 15 minutes you will have 3 files processing

- after 20 minutes 1 file processing

- after 25 minutes all video files should be ready

To limit the server load you can set to run video processing every 30 minutes (in table sys_cron_jobs)

To disable tinymce area just in mail compose/reply modify the following lines in templates/base/scripts/BxBaseMailBox.php file (~near 1605 line):

            //bx_import('BxDolEditor');
            //$oEditor = BxDolEditor::getObjectInstance();
            //$sEditor = $oEditor ? $oEditor->attachEditor ('#compose_message', BX_EDITOR_FULL, true) : '';

           return $sOutputHtml;

Try to to do the following in template/scripts/BxBaseEditorTinyMCE.php file: 

public function attachEditor ($sSelector, $iViewMode = BX_EDITOR_STANDARD, $bDynamicMode = false)
{
    return true;

However it may cause that new lines will not be processed correctly in the entered text.

Can you reproduce the issue on demo.boonex.com ?

In the upcoming version we included stand-alone root cert, so in the case if it isn't found in the system it can be used, we modified bx_file_get_contents the following way:

https://github.com/boonex/dolphin.pro/blob/cabc21f6a26766c5bab1a72672ffcc3a34e17974/inc/utils.inc.php#L1176

Also you need the certificate:

https://github.com/boonex/dolphin.pro/blob/cabc21f6a26766c5bab1a72672ffcc3a34e17974/plugins/curl/cacert.pem

It shouldn't be related, it maybe some other problem.  

CURLOPT_SSL_VERIFYPEER helps in the case if self signed or expired SSL certificates are used somewhere, including remote URLs.

Sometimes servers block requests to itself. In this case it can be fixed if you add the following record in your /etc/hosts file:

127.0.0.1 your-domain.com

replace your-domain.com with your real domain.

But this change require root access to the server.

I would suggest to try to apply the following fix:
https://github.com/boonex/dolphin.pro/commit/14a1f29a14b7ee8143b219ef854a985b301008e0 

or just wait for the 7.3.2 version upgrade pack