To add the WeVideo app to your Chrome browser, you can use this direct link.
If you need to force install the extension for your organizational unit users, you can refer to this page and follow the instructions there. If the app doesn't appear in the search on that page, you can add a custom app and use the following information:
- ID: okgjbfikepgflmlelgfgecmgjnmnmnnb
- URL: https://chrome.google.com/webstore/detail/wevideo-video-editor-and/okgjbfikepgflmlelgfgecmgjnmnmnnb