Videos show that the weather was poor/raining.
Likelihood that the pilot was trying to get under the weather (avoiding entering clouds) and most likely either had a bird strike or more probably hit cables causing the break up.
It is possible that the break up could be caused by stress G forces or poor maintenance.
data on N414RS
https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=414RS