I do not understand bug or feature. If you select a file type separately, then for video files the format is displayed. If you select the file type for a custom signature, then nothing works.
[BUG] Preview captions
Moderators: XnTriq, helmut, xnview, Dreamer
Re: [BUG] Preview captions
This problem is supposed to be fixed in XnView MP 0.96. Please check and confirm the bug fix here.
Pierre.