Thank you for contacting us.
Do you mean the wpForo Advanced Attachments addon? To tell the truth, I don't follow you well. It'd be easy for us to understand the issue if you provide us some screenshots.
Please see the difference between the wpForo Embeds and wpForo Advanced Attachments addons.
The wpForo Embeds addon is designed as a core post content replacer. It checks content provider URLs and replaces to content provider view (video, audio players, social network widgets, etc..).
wpForo Embeds is a 3rd party URL (Youtube, Soundcloud, etc.) embed-er addon.
wpForo Advanced Attachments is a file attachment plugin. It allows attaching multiple files, images, videos, audio and all other file types you’ve allowed in settings.
wpForo Advanced Attachments: