Allow stage and send of video, even if we can't get screenshot

ts/test-both/helpers/fakeAttachment.ts

@@ -1,7 +1,10 @@
 // Copyright 2021 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
-import type { AttachmentType } from '../../types/Attachment';
+import type {
+  AttachmentType,
+  AttachmentDraftType,
+} from '../../types/Attachment';
 import { IMAGE_JPEG } from '../../types/MIME';
 
 export const fakeAttachment = (
@@ -13,3 +16,13 @@ export const fakeAttachment = (
   size: 10304,
   ...overrides,
 });
+
+export const fakeDraftAttachment = (
+  overrides: Partial<AttachmentDraftType> = {}
+): AttachmentDraftType => ({
+  pending: false,
+  contentType: IMAGE_JPEG,
+  path: 'file.jpg',
+  size: 10304,
+  ...overrides,
+});