Because we pause/resume replay when an app goes foreground/background, we should reflect this somehow on the playback (e.g. gray out the video view and also the replay timeline part of it). We could do that based off of the breadcrumb that the SDKs send.

Currently these breadcrumbs have:

• category: navigation
• data["state"]: foreground|background

Open question: is this breadcrumb data sufficient or should we introduce a new category/type or add more data?