Add "Duration Filters" for video selection

[try312]

1. Some channels have videos with short duration (1-9 minutes) and long duration (2 hour+).
2. If someone only wanted the short duration videos, currently there is no way to filter by duration.
3. Therefore, please consider adding "Duration Filters" for Min and Max values, similar to the "Filesize Filters" under the Video Selection tab, as this enhancement would be very much appreciated by many users.