diff --git a/rowers/templates/embedded_video.html b/rowers/templates/embedded_video.html
index 5751495a..fff9c356 100644
--- a/rowers/templates/embedded_video.html
+++ b/rowers/templates/embedded_video.html
@@ -66,9 +66,10 @@
       //    after the API code downloads.
       var player;
       var videotime = 0;
-      var boatspeed = [{% for s in boatspeed %}{{ s|floatformat:4 }},{% endfor %}];
-      var latitude = [{% for lat in latitude %}{{ lat }},{% endfor %}];
-      var longitude = [{% for lon in longitude %}{{ lon }},{% endfor %}];
+      var data = JSON.parse('{{ data|safe }}');
+      var boatspeed = data["boatspeed"];
+      var latitude = data["latitude"];
+      var longitude = data["longitude"];
 
       function onYouTubeIframeAPIReady() {
         player = new YT.Player('player', {
diff --git a/rowers/views/workoutviews.py b/rowers/views/workoutviews.py
index 4fcd1d07..94b0e7a0 100644
--- a/rowers/views/workoutviews.py
+++ b/rowers/views/workoutviews.py
@@ -6,6 +6,12 @@ from __future__ import unicode_literals
 from rowers.views.statements import *
 import rowers.teams as teams
 
+import numpy
+
+def default(o):
+    if isinstance(o, numpy.int64): return int(o)
+    raise TypeError
+
 # Show a video compared with data
 @user_passes_test(ispromember,login_url="/rowers/paidplans/",
                   message="This functionality requires a Pro plan or higher",
@@ -17,7 +23,7 @@ def workout_video_view(request,id=0):
     df.sort_values(by='time',inplace=True)
     df.set_index(pd.to_timedelta(df['time'],unit='s'),inplace=True)
     df2 = df.resample('1s').mean().interpolate()
-    boatspeed = df2['velo']
+    boatspeed = (100*df2['velo']).astype(int)/100.
 
     coordinates = dataprep.get_latlon_time(w.id)
     coordinates.set_index(pd.to_timedelta(coordinates['time'],unit='s'),inplace=True)
@@ -30,9 +36,9 @@ def workout_video_view(request,id=0):
                                        w.name)
 
     # bundle data
-    data = {'boatspeed':boatspeed.values,
-            'latitude':latitude.values,
-            'longitude':longitude.values}
+    data = {'boatspeed':[ v for v in boatspeed.values],
+            'latitude':[ l for l in latitude.values],
+            'longitude':[ l for l in longitude.values]}
 
     return render(request,
                   'embedded_video.html',
@@ -42,6 +48,7 @@ def workout_video_view(request,id=0):
                       'boatspeed': boatspeed.values,
                       'latitude': latitude.values,
                       'longitude': longitude.values,
+                      'data': json.dumps(data,default=default),
                       'mapscript': mapscript,
                       'mapdiv': mapdiv,
                       })