Unidentified mannikins (Lonchura sp) in the NT

Whilst we were near Timber Creek, NT recently Mike Eaton and I stopped at a waterhole (…around lunch-time) and saw a variety of finches drinking, there were Long-tailed, Star, Zebra, Pictorella Mannikin but can anyone identify the two immature Mannikin? (I believe they are either Chestnut-breasted or Yellow-rumped but would welcome others views. Please note that there are Long-tailed and Star Finch (immature with red tail) also in the video, plus Diamond and Peaceful Doves.

Unidentified Mannikins