--- a/dom/canvas/CanvasRenderingContext2D.cpp
+++ b/dom/canvas/CanvasRenderingContext2D.cpp
@@ -2459,17 +2459,19 @@ CanvasRenderingContext2D::CreatePattern(
     HTMLImageElement* img = &aSource.GetAsHTMLImageElement();
     if (img->IntrinsicState().HasState(NS_EVENT_STATE_BROKEN)) {
       aError.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
       return nullptr;
     }
 
     htmlElement = img;
   } else if (aSource.IsHTMLVideoElement()) {
-    htmlElement = &aSource.GetAsHTMLVideoElement();
+    auto& video = aSource.GetAsHTMLVideoElement();
+    video.MarkAsContentSource(mozilla::dom::HTMLVideoElement::CallerAPI::CREATE_PATTERN);
+    htmlElement = &video;
   } else {
     // Special case for ImageBitmap
     ImageBitmap& imgBitmap = aSource.GetAsImageBitmap();
     EnsureTarget();
     RefPtr<SourceSurface> srcSurf = imgBitmap.PrepareForDrawTarget(mTarget);
     if (!srcSurf) {
       JSContext* context = nsContentUtils::GetCurrentJSContext();
       if (context) {
@@ -4760,16 +4762,17 @@ CanvasRenderingContext2D::DrawImage(cons
     imgSize = gfx::IntSize(imageBitmap.Width(), imageBitmap.Height());
   }
   else {
     if (aImage.IsHTMLImageElement()) {
       HTMLImageElement* img = &aImage.GetAsHTMLImageElement();
       element = img;
     } else {
       HTMLVideoElement* video = &aImage.GetAsHTMLVideoElement();
+      video->MarkAsContentSource(mozilla::dom::HTMLVideoElement::CallerAPI::DRAW_IMAGE);
       element = video;
     }
 
     srcSurf =
      CanvasImageCache::LookupCanvas(element, mCanvasElement, &imgSize, mIsSkiaGL);
   }
 
   nsLayoutUtils::DirectDrawInfo drawInfo;

--- a/dom/canvas/ImageBitmap.cpp
+++ b/dom/canvas/ImageBitmap.cpp
@@ -788,16 +788,18 @@ ImageBitmap::CreateInternal(nsIGlobalObj
 
   return ret.forget();
 }
 
 /* static */ already_AddRefed<ImageBitmap>
 ImageBitmap::CreateInternal(nsIGlobalObject* aGlobal, HTMLVideoElement& aVideoEl,
                             const Maybe<IntRect>& aCropRect, ErrorResult& aRv)
 {
+  aVideoEl.MarkAsContentSource(mozilla::dom::HTMLVideoElement::CallerAPI::CREATE_IMAGEBITMAP);
+
   // Check network state.
   if (aVideoEl.NetworkState() == HTMLMediaElement::NETWORK_EMPTY) {
     aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
     return nullptr;
   }
 
   // Check ready state.
   // Cannot be HTMLMediaElement::HAVE_NOTHING or HTMLMediaElement::HAVE_METADATA.

--- a/dom/html/HTMLMediaElement.cpp
+++ b/dom/html/HTMLMediaElement.cpp
@@ -2541,16 +2541,18 @@ HTMLMediaElement::AddCaptureMediaTrackTo
 
 already_AddRefed<DOMMediaStream>
 HTMLMediaElement::CaptureStreamInternal(bool aFinishWhenEnded,
                                         bool aCaptureAudio,
                                         MediaStreamGraph* aGraph)
 {
   MOZ_RELEASE_ASSERT(aGraph);
 
+    MarkAsContentSource(CallerAPI::CAPTURE_STREAM);
+
   nsPIDOMWindowInner* window = OwnerDoc()->GetInnerWindow();
   if (!window) {
     return nullptr;
   }
 #ifdef MOZ_EME
   if (ContainsRestrictedContent()) {
     return nullptr;
   }