diff --git a/src/dialog_video_properties.cpp b/src/dialog_video_properties.cpp
index 272fcb107..01b863344 100644
--- a/src/dialog_video_properties.cpp
+++ b/src/dialog_video_properties.cpp
@@ -17,6 +17,7 @@
 #include "ass_file.h"
 #include "async_video_provider.h"
 #include "format.h"
+#include "help_button.h"
 #include "options.h"
 #include "resolution_resampler.h"
 
@@ -75,6 +76,7 @@ int prompt(wxWindow *parent, bool ar_changed, int sx, int sy, int vx, int vy) {
 
 	d.Bind(wxEVT_BUTTON, [&](wxCommandEvent&) { d.EndModal(rb->GetSelection() + 1); }, wxID_OK);
 	d.Bind(wxEVT_BUTTON, [&](wxCommandEvent&) { d.EndModal(0); }, wxID_CANCEL);
+	d.Bind(wxEVT_BUTTON, [&](wxCommandEvent&) { HelpButton::OpenPage("Resolution mismatch"); }, wxID_HELP);
 
 	return d.ShowModal();
 }
diff --git a/src/help_button.cpp b/src/help_button.cpp
index 0eb905cad..9c84686b7 100644
--- a/src/help_button.cpp
+++ b/src/help_button.cpp
@@ -39,7 +39,7 @@ static const char *pages[][2] = {
 	{"Attachment Manager", "Attachment_Manager"},
 	{"Automation Manager", "Automation/Manager"},
 	{"Colour Picker", "Colour_Picker"},
-	{"Dummy Video", "Video#dummyvideo"},
+	{"Dummy Video", "Video#dummy-video"},
 	{"Export", "Exporting"},
 	{"Fonts Collector", "Fonts_Collector"},
 	{"Kanji Timer", "Kanji_Timer"},
@@ -48,6 +48,7 @@ static const char *pages[][2] = {
 	{"Paste Over", "Paste_Over"},
 	{"Properties", "Properties"},
 	{"Resample resolution", "Resolution_Resampler"},
+	{"Resolution mismatch", "Script_Resolution#automatic-resolution-change"},
 	{"Shift Times", "Shift_Times"},
 	{"Select Lines", "Select_Lines"},
 	{"Spell Checker", "Spell_Checker"},