Currently, if a segment is missing, when the playback reaches a certain point, it just halts (the buffer controller seems to think there is not enough data buffered to keep going).
This could be handled more nicely I guess, for example, by skipping the interval of the missing data (we know the duration of the missing segment so we should be able to seek to skip it).
This is especially helpful if the last segment is missing. For example, each segment may have a duration of 3 seconds, except for the last one which might be less (for example, 100ms). In this case, we will halt 3 seconds before the video ends, just because we're missing the last 100ms (it would be nicer to just play to end - if the missing segment is the last one, forget about it).
