Why do you ask for links instead of files?
In short: Email attachments are compressed and easy to lose. A shared folder keeps the full-resolution originals under your control and in one place.
Compression smears exactly the detail I need: fine surface scratches, print pattern, the edge of a corner. A link to a Google Drive, iCloud or Dropbox folder, or an unlisted video, gives me the original files.
It also keeps you in control. You can see what you shared and remove access when the job is done, and the copy I keep for the record is handled under the retention and consent policy.