There are 2 ways to openning a video from a shared link.
1. Tap and hold the link.
Choose Copy.
Open eJOY App -> Tap More
Then Open video from clipboard
2. For iPhone : Tap and hold the link.
Choose Open in Safari / Open link.
Sometimes you can't tap and hold, so just tap the link.
It opens the App store -> choose Open.
Tap More -> Then Open video from clipboard
For Android: Tap and hold link to see options.
Choose Open link.
Choose eJOY Go icon
There you go!