diff --git a/toolkit/content/widgets/videocontrols.xml b/toolkit/content/widgets/videocontrols.xml
index ff22a31d9c44..4b4accef6a03 100644
--- a/toolkit/content/widgets/videocontrols.xml
+++ b/toolkit/content/widgets/videocontrols.xml
@@ -202,7 +202,7 @@
                 <label class="errorLabel" anonid="errorNetwork">&error.network;</label>
                 <label class="errorLabel" anonid="errorDecode">&error.decode;</label>
                 <label class="errorLabel" anonid="errorSrcNotSupported">&error.srcNotSupported;</label>
-                <label class="errorLabel" anonid="errorNoSource">&error.noSource;</label>
+                <label class="errorLabel" anonid="errorNoSource">&error.noSource2;</label>
                 <label class="errorLabel" anonid="errorGeneric">&error.generic;</label>
             </vbox>
 
diff --git a/toolkit/locales/en-US/chrome/global/videocontrols.dtd b/toolkit/locales/en-US/chrome/global/videocontrols.dtd
index ba2dfa1bec2e..808c95159d44 100644
--- a/toolkit/locales/en-US/chrome/global/videocontrols.dtd
+++ b/toolkit/locales/en-US/chrome/global/videocontrols.dtd
@@ -24,7 +24,7 @@
 <!ENTITY error.network "Video playback aborted due to a network error.">
 <!ENTITY error.decode "Video can't be played because the file is corrupt.">
 <!ENTITY error.srcNotSupported "Video format or MIME type is not supported.">
-<!ENTITY error.noSource "Video not found.">
+<!ENTITY error.noSource2 "No video with supported format and MIME type found.">
 <!ENTITY error.generic "Video playback aborted due to an unknown error.">
 
 <!-- LOCALIZATION NOTE (scrubberScale.nameFormat): the #1 string is the current