Backround actor

Glechner: Yes, you should be able to list your uncredited work as long as you have at least one credited job already listed in the database. Make sure to use the attribute (uncredited) when you submit each of those roles.

The guidelines for uncredited work can be found at https://help.imdb.com/article/contribution/filmography-credits/i-worked-on-a-title-but-did-not-receive-a-screen-credit-can-it-be-listed-on-imdb/G3BDEA5Y4U9LP9BW#.

A rule there that would be relevant to you as a background actor says:

For cast/acting appearances, you must be identifiable and featured on-screen in the final released cut of the title. In other words, it's not enough to have worked on a production: your scenes must be included in the final cut and it must be possible to easily identify your appearance (i.e. background work as a crowd member or a similar role where it is impossible to recognize the subject are not eligible). If you ended up on the cutting room floor, you are not eligible to be listed. We may ask you to supply evidence of this, so you should be prepared to provide photos/stills/screen grabs to verify that you are featured.

Finally, please note that if you get your uncredited background work listed, and then later become more established as an actor with speaking, credited roles, you would not be able to have your uncredited work removed from IMDb if you wanted to do so. If IMDb accepts your uncredited work for listing, you should assume it will be there permanently.

I hope this helps. Good luck!