Merge pull request #5369 from marmelab/gix-demo-link-readmes

Fix Demo Video Links in READMEs

packages/ra-data-fakerest/README.md

@@ -6,7 +6,7 @@ This package takes a JSON object as input, then creates a client-side data provi
 
 All operations carried out in react-admin are local to the browser, and last only for the current browser session. A browser refresh erases all modifications.
 
-![react-admin demo](http://static.marmelab.com/react-admin.gif)
+[![react-admin-demo](https://marmelab.com/react-admin/img/react-admin-demo-still.png)](https://vimeo.com/268958716)
 
 ## Installation
 

packages/ra-data-json-server/README.md

@@ -2,7 +2,7 @@
 
 JSON Server Data Provider for [react-admin](https://github.com/marmelab/react-admin), the frontend framework for building admin applications on top of REST/GraphQL services.
 
-![react-admin demo](http://static.marmelab.com/react-admin.gif)
+[![react-admin-demo](https://marmelab.com/react-admin/img/react-admin-demo-still.png)](https://vimeo.com/268958716)
 
 ## Installation
 

packages/ra-data-simple-rest/README.md

@@ -2,7 +2,7 @@
 
 Simple REST Data Provider for [react-admin](https://github.com/marmelab/react-admin), the frontend framework for building admin applications on top of REST/GraphQL services.
 
-![react-admin demo](http://static.marmelab.com/react-admin.gif)
+[![react-admin-demo](https://marmelab.com/react-admin/img/react-admin-demo-still.png)](https://vimeo.com/268958716)
 
 ## Installation
 

packages/ra-i18n-polyglot/README.md

@@ -2,7 +2,7 @@
 
 Polyglot i18n provider for [react-admin](https://github.com/marmelab/react-admin), the frontend framework for building admin applications on top of REST/GraphQL services. It relies on [polyglot.js](https://airbnb.io/polyglot.js/), which uses JSON files for translations.
 
-![react-admin demo](http://static.marmelab.com/react-admin.gif)
+[![react-admin-demo](https://marmelab.com/react-admin/img/react-admin-demo-still.png)](https://vimeo.com/268958716)
 
 ## Installation