diff --git a/lib/media/media-utils.js b/lib/media/media-utils.js
--- a/lib/media/media-utils.js
+++ b/lib/media/media-utils.js
@@ -46,7 +46,9 @@
     (!!media.uri && isBlobServiceURI(media.uri)) ||
     (!!media.holder && isBlobServiceURI(media.holder)) ||
     (!!media.thumbnailURI && isBlobServiceURI(media.thumbnailURI)) ||
-    (!!media.thumbnailHolder && isBlobServiceURI(media.thumbnailHolder))
+    (!!media.thumbnailHolder && isBlobServiceURI(media.thumbnailHolder)) ||
+    (!!media.blobURI && isBlobServiceURI(media.blobURI)) ||
+    (!!media.thumbnailBlobURI && isBlobServiceURI(media.thumbnailBlobURI))
   );
 }
 
diff --git a/lib/types/media-types.js b/lib/types/media-types.js
--- a/lib/types/media-types.js
+++ b/lib/types/media-types.js
@@ -672,25 +672,31 @@
   localMediaSelection: t.maybe(nativeMediaSelectionValidator),
 });
 
-export type EncryptedImage = {
+type EncryptedImageCommons = {
   +id: string,
-  // a media URI for keyserver uploads / blob holder for Blob service uploads
-  +holder: string,
   +encryptionKey: string,
   +type: 'encrypted_photo',
   +dimensions: Dimensions,
   +thumbHash: ?string,
 };
+// old message formats (native codeVersion < FUTURE_CODE_VERSION) used holder
+// new format uses blobURI. Effectively, they both mean blob URI
+export type EncryptedImage =
+  | { ...EncryptedImageCommons, +holder: string }
+  | { ...EncryptedImageCommons, +blobURI: string };
 
-export const encryptedImageValidator: TInterface<EncryptedImage> =
-  tShape<EncryptedImage>({
-    id: tID,
-    holder: t.String,
-    encryptionKey: t.String,
-    type: tString('encrypted_photo'),
-    dimensions: dimensionsValidator,
-    thumbHash: t.maybe(t.String),
-  });
+const encryptedImageCommonsValidator = {
+  id: tID,
+  encryptionKey: t.String,
+  type: tString('encrypted_photo'),
+  dimensions: dimensionsValidator,
+  thumbHash: t.maybe(t.String),
+};
+
+const encryptedImageValidator = t.union<EncryptedImage>([
+  tShape({ ...encryptedImageCommonsValidator, holder: t.String }),
+  tShape({ ...encryptedImageCommonsValidator, blobURI: t.String }),
+]);
 
 export type Video = {
   +id: string,
@@ -717,33 +723,44 @@
   localMediaSelection: t.maybe(nativeMediaSelectionValidator),
 });
 
-export type EncryptedVideo = {
+type EncryptedVideoCommons = {
   +id: string,
-  // a media URI for keyserver uploads / blob holder for Blob service uploads
-  +holder: string,
   +encryptionKey: string,
   +type: 'encrypted_video',
   +dimensions: Dimensions,
   +loop?: boolean,
   +thumbnailID: string,
-  +thumbnailHolder: string,
   +thumbnailEncryptionKey: string,
   +thumbnailThumbHash: ?string,
 };
+// old message formats (native codeVersion < FUTURE_CODE_VERSION) used holder
+// new format uses blobURI. Effectively, they both mean blob URI
+export type EncryptedVideo =
+  | { ...EncryptedVideoCommons, +holder: string, +thumbnailHolder: string }
+  | { ...EncryptedVideoCommons, +blobURI: string, +thumbnailBlobURI: string };
 
-export const encryptedVideoValidator: TInterface<EncryptedVideo> =
-  tShape<EncryptedVideo>({
-    id: tID,
+const encryptedVideoCommonsValidator = {
+  id: tID,
+  encryptionKey: t.String,
+  type: tString('encrypted_video'),
+  dimensions: dimensionsValidator,
+  loop: t.maybe(t.Boolean),
+  thumbnailID: tID,
+  thumbnailEncryptionKey: t.String,
+  thumbnailThumbHash: t.maybe(t.String),
+};
+const encryptedVideoValidator = t.union<EncryptedVideo>([
+  tShape({
+    ...encryptedVideoCommonsValidator,
     holder: t.String,
-    encryptionKey: t.String,
-    type: tString('encrypted_video'),
-    dimensions: dimensionsValidator,
-    loop: t.maybe(t.Boolean),
-    thumbnailID: tID,
     thumbnailHolder: t.String,
-    thumbnailEncryptionKey: t.String,
-    thumbnailThumbHash: t.maybe(t.String),
-  });
+  }),
+  tShape({
+    ...encryptedVideoCommonsValidator,
+    blobURI: t.String,
+    thumbnailBlobURI: t.String,
+  }),
+]);
 
 export type Media = Image | Video | EncryptedImage | EncryptedVideo;