How to follow link with variable css

[scrapers]

On Flickr, the link to the download page uses dynamic styles (e.g. a#yui_3_16_0_1_1660897013641_77326). How can I always found the download url so that the scrape continues?

Url: bounds | 21 natural light exposures stacked with mp-e@1.2x m… | Flickr

Sitemap:
{"_id":"flickrAlbumDownload","startUrl":["https://flickr.com/photos/70091193@N06/albums/72157694942289794/with/9018490963"],"selectors":[{"delay":0,"id":"imagePageLink","multiple":true,"parentSelectors":["_root"],"selector":"a.overlay","type":"SelectorLink"},{"delay":0,"id":"downloadPageLink","multiple":true,"parentSelectors":["imagePageLink"],"selector":"a#yui_3_16_0_1_1660897013641_77326","type":"SelectorLink"},{"delay":0,"id":"photoPage","multiple":true,"parentSelectors":["downloadPageLink"],"selector":"ol a","type":"SelectorLink"},{"delay":0,"id":"image","multiple":false,"parentSelectors":["photoPage"],"selector":"#allsizes-photo img","type":"SelectorImage"},{"delay":0,"id":"imageName","multiple":false,"parentSelectors":["imagePageLink"],"regex":"","selector":"h1","type":"SelectorText"}]}

[ViestursWS]

@scrapers Hi, do you have to be logged into the account to view the 'download' page?

As it appears your selector was not functional.

[Kerlin]

Hello, as selector, look in the code with Inspector and take the css of the parent. For example, if the image is in a div, copy the css of this div and add img after a space.
Example :

<img ......>

, enter manually in the selector : .image_big img.
If it's a link, .image_big a. So, for each link, it look at the parent CSS.