With the version 4.2 of Adobe Premiere Pro CS4, it is easy to edit FLV/F4V to premiere without additional tool. By the meantime, it indicates that editing popular web video in premiere is no longer a big task.
However, for Adobe Premiere Pro CS3 user, or other premiere version without FLV support, it is still a problem. What's more, CS4 does not support FLV in all codec. Here is the message I got in CS4, when importing FLV with nellymoser and FLV with screen video. Actually the two files are less than 2 MB.
How to make premiere compatible with FLV video with nellymoser or screen video? The solution is to
use freeware AviSynth to open FLV files in premiere.