diff --git a/content/post/endless-loop/index.md b/content/post/endless-loop/index.md
index 95bcd00..0b3b01f 100644
--- a/content/post/endless-loop/index.md
+++ b/content/post/endless-loop/index.md
@@ -22,4 +22,7 @@ projects: []
 
 All measurements are in Centimeters.
 
-{{< splice/calc_loop >}} 
\ No newline at end of file
+{{< splice/calc_loop >}} 
+
+# Instruction video
+{{< youtube uzK0gApBrCg >}}
\ No newline at end of file
diff --git a/layouts/shortcodes/splice/calc_loop.html b/layouts/shortcodes/splice/calc_loop.html
index 44cab83..a5b1d0e 100644
--- a/layouts/shortcodes/splice/calc_loop.html
+++ b/layouts/shortcodes/splice/calc_loop.html
@@ -40,9 +40,9 @@ function Calculate(obj)
         <label for="loop_dia">Loop diameter (in centimeter)</label>
         <input type="number" min="0" step=".1" class="form-control form-control-lg" id="loop_dia" aria-describedby="emailHelp" placeholder="Enter loop diameter" onChange="Calculate(this.form)">
 
-        <button onClick="Calculate(this.form)" class="btn btn-primary">Calculate</button>
+        <input type="button" onClick="Calculate(this.form)" class="btn btn-primary">Calculate</input>
     </div>
-        <hr>
+    <hr>
     <div class="form-group">
         <label for="idia">Loop size (Diameter of double braid)</label>
         <input type="text" readonly class="form-control-plaintext" id="idia">