YouTube Video Editor

Every day we are doing live YouTube. That file is usually over 1 hour. We need to cut the blank sound area for speedy play and choose a hot stream area. The final results must be over 8 min. but the very interesting highlight cut. We need to make 2 or 3 hot cut files from the original Live Streaming. Also need to create hot thumbnail files.
If you understand Korean and economic words, it will be more good to be one of our editors. We have so many files already ready.