Fix my video tabs on mobile (#750)

src/views/studio/MyVideosView/MyVideos.styles.ts

@@ -8,11 +8,14 @@ export const ViewContainer = styled.div`
 `
 
 export const TabsContainer = styled.div`
-  display: grid;
-  grid-template-columns: 1fr 250px;
   padding-top: ${sizes(8)};
   margin-bottom: ${sizes(8)};
   border-bottom: solid 1px ${colors.gray[800]};
+
+  ${media.medium} {
+    display: grid;
+    grid-template-columns: 1fr 250px;
+  }
 `
 
 export const PaginationContainer = styled.div`