Mobile/Projects/My List: Auto-play video and audio lists

Tracking

Having a handy, self-curated list of video and audio files is great, but let's make it easy for people to view/listen to all that stuff:

Allow users to auto-play all of the videos or audio files in My List when they've filtered their list by those media types.

When I have filtered My List to show just the video items, I want to auto-play all of the unviewed videos on the list, so I don't have to mess around opening and playing each item separately.
When I have filtered My List to show just the audio items, I want to auto-play all of the unlistened-to items on the list, so I don't have to mess around opening and playing each item separately.
When an item on My List has been auto-played, I want that item flagged as "played" so if I come back to My List later I know that I have already seen/heard it.

User value, user delight - once you create a list of playable media, it simply makes sense to have the option to autoplay everything on the list in order. This also works in conjunction with whatever cross-device screencasting features we build, where the user will be able to cast their video or audio list up to another screen and just set it to play there.
User features like this, including screencasting, feed into our marketshare & co-marketing goals.