Bek Hey @Kulga, how do you installed extensions from dev-master branch?
in my example composer.json
If you want to check if your latest updates are reflected, use your github commit hash and my commit page to match them up. Checking the Upgraded time -> Upgraded May 22 09:00 UTC is another method (but not as certain - adjust to your time zone). If your github hash and my commit show the same hash, they are running identical code.
jordanjay29 I believe at the moment he installs release tagged third party extensions, but dev-master for flarum/core and its first party extensions.
Currently everything is in dev-master . You can view this in commits (former in beta.5 and latter devflarum)
s9e/flarum-ext-mediaembed 0.3.2 Embed third-party content in your Flarum.
s9e/flarum-ext-mediaembed dev-master 2d4fce9 Embed third-party content in your Flarum.
As for debugging why it's not working in your forum, that should be in it's own thread (as jordanjay29 noted)