fix video query

Author: tomasvrana

resources/content/pages/index/index-en.md

@@ -1,6 +1,7 @@
 ---
 home_title: en (English) index page content
 home_content:
+  home_video_id: re96UgMk6GQ
   home_intro: |
     Haskell is not “just another programming language”: it embodies a radical and elegant attack on the entire enterprise of writing software. 
     

src/pages/index.js

@@ -72,10 +72,10 @@ export default () => (
               <Grid container spacing={4}>
                 <Grid item md={5} xs={12}>
                   <Hidden mdUp>
-                    <iframe width='100%' height='450' src='https://www.youtube.com/embed/re96UgMk6GQ' allow='accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture' />
+                    <iframe width='100%' height='450' src={`https://www.youtube.com/embed/${content.home_video_id}`} allow='accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture' />
                   </Hidden>
                   <Hidden smDown>
-                    <iframe width='100%' height='315' src='https://www.youtube.com/embed/re96UgMk6GQ' allow='accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture' />
+                    <iframe width='100%' height='315' src={`https://www.youtube.com/embed/${content.home_video_id}`} allow='accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture' />
                   </Hidden>
                 </Grid>
                 <Grid item md={5}>

src/queries/IndexPageQuery.js

@@ -15,6 +15,7 @@ const IndexPageQuery = ({ render }) => (
                 childMarkdownRemark{
                   frontmatter {
                     home_content {
+                      home_video_id
                       home_intro
                       home_claim
                       home_goals {