free version basically cannot import media in linux
You will have to use ffmpeg to convert the video file since the free resolve doesn't work with certain linux codecs you would have to buy studio for that.
...
## davinci resolve
$ sudo pacman -S glu libxcrypt-compat
## opencl gpu stuff
$ git clone https://aur.archlinux.org/opencl-amd.git
$ sudo pacman -S numactl
$ makepkg
$ sudo pacman -U opencl-amd-1:6.2.4-1-x86_64.pkg.tar.zst
## to run it
## https://github.com/boltgolt/howdy/issues/907
## https://bbs.archlinux.org/viewtopic.php?id=289533
$ LD_PRELOAD="/usr/lib/libgio-2.0.so /usr/lib/libgmodule-2.0.so /usr/lib/libglib-2.0.so" /opt/resolve/bin/resolve