I can’t save a large video on my iPhone

The problem is, I have a video file which is about 111MB with resolution 1216x2160 aaaand I can’t save it on my iPhone even though I have a plenty enough space 😭 I tried to send it via airdrop and it shows a pop up with an error and ask me if I want to save it in my documents (I tried this one as well and there’s no way to save it in my gallery from the app), I tried to send a file via telegram and also get the same error. What should I do? I can’t believe that I can shoot in 4K, but can’t save a video with a higher resolution on my iPhone