Uploading Pictures

For instagram you need to view the source of the image you want then find the .jpg url.
E.g.
https://www.instagram.com/p/BXlLrnvDMA3/?taken-by=petosagan.
Right click on image - View Page Source
Near the top is

<link rel="canonical" href="https://www.instagram.com/p/BXlLrnvDMA3/" />
    <meta content="11.3k Likes, 34 Comments - Peter Sagan (@petosagan) on Instagram: “It wasn’t easy today at the @BinckBankTour. It was a reminder that we’re racing in Belgium because…”" name="description" />
    <meta property="og:site_name" content="Instagram" />
    <meta property="og:title" content="Instagram post by Peter Sagan • Aug 9, 2017 at 5:12pm UTC" />
    <meta property="og:image" content="https://scontent-lht6-1.cdninstagram.com/t51.2885-15/e35/20686461_257054481467786_7376661022993547264_n.jpg" />
    <meta property="og:description" content="11.3k Likes, 34 Comments - Peter Sagan (@petosagan) on Instagram: “It wasn’t easy today at the @BinckBankTour. It was a reminder that we’re racing in Belgium because…”" />
    <meta property="fb:app_id" content="124024574287414" />
    <meta property="og:url" content="https://www.instagram.com/p/BXlLrnvDMA3/" />
    <meta property="instapp:owner_user_id" content="187958199" />
    <meta property="al:ios:app_name" content="Instagram" />
    <meta property="al:ios:app_store_id" content="389801252" />
    <meta property="al:ios:url" content="instagram://media?id=1577718620577644599" />
    <meta property="al:android:app_name" content="Instagram" />
    <meta property="al:android:package" content="com.instagram.android" />
    <meta property="al:android:url" content="https://www.instagram.com/p/BXlLrnvDMA3/" />
    
    <meta name="medium" content="image" />
    <meta property="og:type" content="instapp:photo" />

So you just copy the URL

• https://scontent-lht6-1.cdninstagram.com/t51.2885-15/e35/20686461_257054481467786_7376661022993547264_n.jpg
  
  

And use the Image button at the top of this text box