Find all files in the /a/b/c/video/ directory that do not have the extensions .avi, .mov, .webm, .ra, .ram, .mpg, .mpe, .mpeg, .asf, .wmv, .vob, or .flv and have a filename length greater than 8 characters.
grep -vE '\.(avi|mov|webm|ra|ram|mpg|mpe|mpeg|asf|wmv|vob|flv)$' /a/b/c/video/ | awk 'length($1) > 8'