Broken yolk with blood in my eggs - why?

[Littlefrenchyinbigtexas]

Hi everyone!
Our hens started laying not that long ago. A mix of old English bantam and Buff Orpington.
I tried a fertility test on each and was surprised by the results.
Any idea why?
Skip to minute 7:50 in this video to see the test and the yolk.
rest of the video is great too if you are interested in getting a new incubator

thank you!!!

 

[Littlefrenchyinbigtexas]

From what I understand, this might just come from young hens having their first eggs, and should be normal in a few weeks. I hope.