EDIT : Actually the issue is this one : Native Videos in embed feed are not supported if user is not logged in. (And so in a webview chrome app, it is not logged in) Bug reported to Facebook here : https://developers.facebook.com/bugs/353742028342246/ and maybe it is "by design"
Old question :
I want to show a Facebook page feed in a Chrome App, it works very well except native videos are not visible.
To reproduce, take the hello world app: https://github.com/GoogleChrome/chrome-app-samples/tree/master/samples/hello-world
Add permissions:["webview"] in manifest.json
Add this after <h1>Hello, World!</h1> :
<webview src="https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fyoutube%2F&tabs=timeline&width=340&height=500&small_header=false&adapt_container_width=true&hide_cover=false&show_facepile=true" width="340" height="500" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowTransparency="true"></webview>
(use this page : https://developers.facebook.com/docs/plugins/page-plugin and replace 'iframe' with 'webview')
Chrome -> Load Unpacked Extension -> You will see the feed but without the native videos :
If you open index.html with your browser (and use <iframe>) it will show the video...
If I use <webview src="https://www.mydomain.fr/company">, with the correct <iframe> in it, same problem : works except native video.
PS : Youtube Videos are working, you can try with the Youtube page:
<webview src="https://www.facebook.com/plugins/page.php?href=https%3A%2F%2Fwww.facebook.com%2Fyoutube%2F&tabs=timeline&width=340&height=500&small_header=false&adapt_container_width=true&hide_cover=false&show_facepile=true" width="340" height="500" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowTransparency="true"></webview>
I reported the bug to Facebook and maybe it is "by design"
https://developers.facebook.com/bugs/353742028342246/
waiting for a response by the "team" though.