Same video appearing twice not handled

If the same video appears in the same playlist, both will be highlighted while playing and the one that is earlier in the playlist will be used for autoplay.

i.e. if a video is at position 1 and position 10 in a queue, both will be highlighted as active while playing and once the video finishes the next video to play will be position 2.

Expected result would be to track what position you are on so that if you were on position 9 of a playlist, then 10, you should go to 11 instead of 2.

The issue names no files, tests, or entry points. Start by tracing playlist highlighting and autoplay behavior, then reproduce a playlist containing the same video at two positions. Done means only the current occurrence is highlighted and autoplay advances from its current position rather than returning to the earlier duplicate.

Written by the indexing model from the issue text.