If you want to take a look at the application files without installing it, create a new folder and extract the sh file into that folder. Make sure the sha1 hash matches the one below.
da466fa96793c3d650bf11d406ec65fdff9202bf DaVinci_Resolve_12.5.5_Linux.sh
Then...
head -c 9573 DaVinci_Resolve_12.5.5_Linux.sh > davinci_seinstall.sh
tail -c 366724240 DaVinci_Resolve_12.5.5_Linux.sh | tar jxf -