video data randomly displayed in dolphin data panel

i made a clean install of 42.2
i restored all of my data.

several days later i focus about video data in the dolphin data panel.

for a recent (today) downloaded video file i get video data : basic file data and video data as width, height, duration, frequency etc.
for all the other videos only basic file data : type, size, modified, label, note, comment

this is true for all video formats: mp4, flv, ts