You can add videos for your products and some other pages.
From the admin menu, go to catalog/opencartplayer, you should see 'videos' tab, you need to add videos.
From the videos tab, click insert to open videos setting page for adding videos.
If you need, You can add, update and delete the videos.
You can add more type of videos.
If you check publish, you will be use that videos in product page and some other places.
Then click save to add videos on videos list.