Video Studio Express 
Split, merge and crop videos regardless the video size and format.
Free TrialBuy NowYouTube is the biggest video sharing site on the planet. But most videos uploaded to YouTube are made by amateurs usually with modest video making equipment. Therefore, many people would like to further edit the videos downloaded from YouTube.
Good news for those who are looking for a great YouTube Video Editor is, Aimersoft Video Editor is just such an awesome YouTube (FLV) Video Editor that you are looking for. With this YouTube Video Editor, you can:
If these are what you wanted, please follow the below steps to start editing your YouTube(FLV) videos:
Click "Import" or "Media" tab to locate the YouTube videos that you have downloaded into Video Editor for Mac. All the added files will be listed in the video library.

This YouTube Video Editor provides two professional editing panels Timeline and Editing Box to fully meet your different editing requirement.
For example, if you want to combine, split, trim, copy, paste, add transitions or personalize background music to your downloaded YouTube videos, the timeline panel without doubt will offer the most precise editing for you.

But if you would like to adjust the movie affects, rotate the video image, or crop some unwanted parts of the video, you should choose the editing box as your editing helper.

With this YouTube Video Editor, you can:

It's definitely up to you on how to save your edited creation. Of course, besides the above mentioned saving options, you can also choose to burn the edited YouTube video to DVD for permanent collection.
Split, merge and crop videos regardless the video size and format.
Free TrialBuy NowA powerful video editor and converter owns both brilliant video editing
Free TrialBuy Now