Could get an OTG adapter similar to this

https://www.amazon.com/dp/B09TR96JZC?ref_=cm_sw_r_apan_dp_GRD402QMT5P6K7ABTZQE

And just use a 1 TB micro SD card to transfer those videos and pics to it. Then just put that micro SD card into a computer or your Galaxy S20 Ultra.

I also have an iPhone SE and Galaxy S20+ and I do this same thing to transfer pics back and forth between both phones. I have 360 GB of music and 116 GB of videos so about 500 GB in all.