Fix unextensioned images

content/notes/twitter/12650760158/index.md

@@ -4,4 +4,4 @@ tags:
 - imported
 - from-twitter
 ---
-Who would want to keep newspapers alive? Hurry up and die! {{< imgorvid src="1he6lp" >}} \(via [@threedaymonk](/twitter/#/threedaymonk))
+Who would want to keep newspapers alive? Hurry up and die! {{< imgorvid src="1he6lp.jpg" >}} \(via [@threedaymonk](/twitter/#/threedaymonk))

content/notes/twitter/13507841102/index.md

@@ -5,4 +5,4 @@ tags:
 - from-twitter
 - UKElection
 ---
-BBC Exit poll: Con:307,Lab:255,Lib:59,Other: 29  {{< imgorvid src="1lleur" >}}  [UKElection](/tags/ukelection)
+BBC Exit poll: Con:307,Lab:255,Lib:59,Other: 29  {{< imgorvid src="1lleur.jpg" >}}  [UKElection](/tags/ukelection)

content/notes/twitter/13508824920/index.md

@@ -4,4 +4,4 @@ tags:
 - imported
 - from-twitter
 ---
-{{< imgorvid src="1lljux" >}}  Election video :P
+{{< imgorvid src="1lljux.jpg" >}}  Election video :P

content/notes/twitter/14021178054156289/index.md

@@ -4,4 +4,4 @@ tags:
 - imported
 - from-twitter
 ---
-that's fairly ingenious: {{< imgorvid src="3fbk66" >}} \(via [@nachimir](/twitter/#/nachimir), [@fluffosaur](/twitter/#/fluffosaur))
+that's fairly ingenious: {{< imgorvid src="3fbk66.jpg" >}} \(via [@nachimir](/twitter/#/nachimir), [@fluffosaur](/twitter/#/fluffosaur))