I am working all the time with Flash Video files and I need a quick preview before I open Adobe Media Player or After Effects.
Unfortunately, the Finder cannot offer that yet, so I needed some help. The help came from this great website: quicklookplugins.com
.pkgfile of the latest release.
learn more from their github page.
That’s it, now you should be able to preview .flv files in Finder. Much better! Thanks!
P.S.: I personally stopped using FLV files since HTML5 uses video elements.