Adding photos to the madiapool (Davinci Resolve)

Hello everebody,
I am new to Davinci Resolve 15 and it seems to be very promising
. I have a question about adding a few photos to the media pool.
I have a few MP4 files in the media pool. For the story of the film I want to add a few photos.
When I look in the images folder, I see files with more than 1 photo. How do I choose one?
See the attachment what I mean.
Foto [001-025].jpg looks like there are 25 photos in it. If i select the photo and move with the cursor over de photo it change quickly to other photos. The same as in a MP4 file.
Thanks.
Bert from the Netherlands.
I am new to Davinci Resolve 15 and it seems to be very promising

I have a few MP4 files in the media pool. For the story of the film I want to add a few photos.
When I look in the images folder, I see files with more than 1 photo. How do I choose one?
See the attachment what I mean.
Foto [001-025].jpg looks like there are 25 photos in it. If i select the photo and move with the cursor over de photo it change quickly to other photos. The same as in a MP4 file.
Thanks.
Bert from the Netherlands.