Nothing wrong happened, please, don't worry
No eagles, no hawks and both birds are ok
[ if google translates me correctly Kulkuri's words
I watched all the situation.
At ~14 the male Barlinek suddenly escaped from the nest. After that the female Brynka was coming back twice to the nest. First time for few minutes, then for ~20'.
It was strong wind today but in some moment, after Brynka's second escape it was heard a tractor motor. So, I think birds heard it all the time and this is what scared them. All the time it was also heard from distance an osprey's alert calling, probably it was Barlinek flying around the nest.
I think there were carring out some works in the forest with the tractor but it seems too close to the nest.
At ~16 Brynka came back to the nest and at 16:34 Barlinek brought her a headless big fish
Barlinek was disturbed once more at 17:43 and escaped, and then were heard humans voices.
Happily, Brynka came back in few minutes
I hope you understand my explanation and please ask if you have any questions
P.S. Kulkuri, I can't understand what do you write about Kelasin video