Please help, is this a blood ring? First time Incubating duck eggs

[Tonyroo]

Update, I candled today (day 10) and I definitely see some movement. I attached a video

Congratulations on your thriving eggs.

 

[MotherDucker3]

Congratulations on your thriving eggs.

Thank you! Unfortunately just one egg is developing out of the 4. The rest don't seem to be fertile. But one is better then none

 

[MotherDucker3]

Ok I think I'm paranoid now. I have watched the video a few times and now I feel like I see 2 embryos. Are my eyes playing tricks on me?? I really hope it's not twins. This was the biggest egg out of the 4 . I know duck twins rarely survive. Does it look like twins?? @DucksAreBest