So, this is a new forum up for testing and see what it is capable of. Welcome!

yeah, I guess we need an photo upload feature for the forum! 😺

Definitely right call. I try to create one, but man, I made a mess. :) LOl.

Also since you are here, There is a few missing strings in English lang.

Backend.php ===settings.php===

'admin_new_posts_indicator' => 'Admin New Posts Indicator',
  'show_blue_dot_for_admins' => 'Show blue dot for admins',
  'admin_new_posts_indicator_hint' => 'If enabled, admins will also see the blue dot for new topics, just like regular users.',

and pm_reply_prefix somewhere.

Also

video_embed_note
supported_platforms
video_url
insert_video

P.S. Hey, thanks for quick video setup. 👍 You forgot to add video button to post_edit.php :)

Now that the video is there need few icons added

$popularIcons = [
    'fas fa-music',
    'fas fa-video'
];

Aldo code block needs to be like this, otherwise it will shoot beyond post it self as you can see on top.

.post-content pre {
    background: var(--surface-hover);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1em;
    direction: ltr;
    text-align: left;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-x: hidden;
}

Also I moved

<?php 
$categories = $displayCategories;
$categoriesPerRow = min(count($displayCategories), (int)Settings::get('categories_per_row', 4));
if ($categoriesPerRow < 1) $categoriesPerRow = 1;
include __DIR__ . '/templates/categories.php'; 
?>

Below topics. Looks better and you see topics right away.

Note to self or whatever:

Implement nsfw tags, as a warning...

Also, in new version reply and like tags do not work, they need to be like this:

foreach ($likeBlocks as $placeholder => $tag) {
        $processed = processLikeShortcode($tag, $topic_id, $current_user_id);
        $html = str_replace($placeholder, $processed, $html);
    }

    foreach ($replyBlocks as $placeholder => $tag) {
        $processed = processReplyShortcode($tag, $topic_id, $current_user_id);
        $html = str_replace($placeholder, $processed, $html);
    }

Yea, another good observation is When user sends you message you get notification, same notification needs to pop up when someone reply to your topic.