It would be fine to have a countdown (not displayed on chromecast screen)
Instead of the first image of the video, it would be fine to choose between :
1- first image
2- 100th image
3- random image
Because, often, the first image is black (black fade i.e.)
It would be useful to display not only the name of file, but also the length and to add a little comment (when the name doesn't explain what is the content).
Working with premium version since a week.
I manage local files but it would be fine to build playlist from url (i.e. video on social network, like facebook. Those videos have a single url I can add to favorites...