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If you are using ad blocking, suspend it momentarily, then check your dashboard. I had to stop ad blocking for this site to allow the stats to display. I use Brave browser.

Do some research in that discussion and in the discussion referenced there. In short: you can set default values in the config, but anybody who has changed any notification preference before will not use that default values. Instead of starting to send mails that your forum never sent before (which could be seen as spam by some of your users), I would recommend to write an announcement or a message with a hint to that "new feature"

You need to give a special permission to the role. So start in the dashboard with the permissions. It is called something with advanced notifications. After that users can opt in on a category basis.

That doesn't scale well on big forums with many users using that feature

This is what worked for me-

Edit the file- "/applications/yaga/design/reactions.css" and add "!important" next to the "background-image: url('images/action-sprites.png')" and "background-image: url('images/action-sprites-white.png')" so it should look like this-

background-image: url('images/action-sprites.png') !important;

background-image: url('images/action-sprites-white.png') !important;

I had found this solution by searching the forum, so it is always a good idea to search the forum before asking a question.

HTH.

Or via "Roles & Permissions" only give the "View" permission for that category.

When you create (or edit) your category, click on This category has custom permissions. and you will see all the options.

Okay, I was a little bit too hasty in the beginning. I saw "private videos" in the title and I had assumed that those videos are only accessible for users with access rights. Only now I have realized that you have explained it further as videos "Embedd on selected domains only".

Since you must send additional data when the video information is fetched, this code in the VimeoEmbedFactory is relevant:

   public function createEmbedForUrl(string $url): AbstractEmbed {
       $response = $this->httpClient->get(
           self::OEMBED_URL_BASE,
           ["url" => $url]
       );

This lines start the request where your referrer should be enclosed. I can think of three ways to ensure that.

1. (Worst but easiest) Change that code. The HttpClients get method allows specifying a custom header:

   public function createEmbedForUrl(string $url): AbstractEmbed {
       $response = $this->httpClient->get(
           self::OEMBED_URL_BASE,
           ["url" => $url],
           ['REFERER' => 'your-whitelisted-domain.de']
       );

2. You can set default headers which will be send with every request the HttpClient starts. WHile this is slightly better than the above in terms of how you should extend Vanilla, it takes influence on each and every request the client initiates. Therefore I don't like that.

3. In theory it should be possible to replace which class is used as VimeoEmbedFactory. Instead of changing the original file, copying, changing the copy and let that copy be the default for Vimeo embeds would be the cleanest approach.

I was interested if 3. would be as "easy" as I thought and therefore I tested something. Please try the attached plugin. You need to edit line 58 of MyVimeoEmbedFactory.php

Not sure if this already works, but at least that file is used for Vimeo requests which makes it cleaner (than editing core files) if you want to test something