Oh, I guess you also need to manually unlock the application in the database. It's the app_requires_manual_intervention field in the core_applications table.
Here's a query you can run directly (if your tables use a prefix, adjust as needed):
UPDATE core_applications SET app_requires_manual_intervention=0 WHERE app_directory='videos';
Clear again the cache after running the query, and the app should be unlocked.
IPS won't offer support for 3rd party modifications. At most, they'll redirect you to the application's developer (who is currently MIA) or 3rd party developers in the Providers Directory. (Example link under my photo.)
Anyway, with the query above you should be good to go.