How to Convert Youtube video FLV to M4V on Mac? When you surf the Youtube.com, do you have the desire to save your favourite Youtube videos on your Mac? But when you watch them, you will find the result is disappointing----the Apple Quick Time Player can't open and play them directly. To get Youtube video .flv into Quickime player is not a straightforward process.There is a work around to play flv on Mac------to use a program to convert flv to M4Vplayable with Quicktime .FLV to M4V Converter for Mac is a ideal choice at this point. You will be surprised by its powerful features and find that converting the Youtube videos.flv to M4V is just one part of features. The FLV to M4V Converter can convert the Youtube videos.flv to a variety of other video like MP4, .mov(Quick Time),.mpg, .swf, etc as well. And you can extract audio from Youtube videos save as wma, mp3,mp2 without quality loss. If you aren't satisfied with the video effect, you can tune the brightness, contrast and saturation of Youtube videos with the FLV to M4V Converter to get the best effect . Its versatile features,various flexible settings and good quality make it one of the most advanced FLV to M4V Converter for Mac users. Step by step demonstration on how to operate the FLV to M4V Converter on Mac: Step1. Install and open the FLV to M4V Converter on your Mac. Choose Intel Version or PowerPC Version to install according to your Mac system, and then launch it. Step2. Add the Youtube videos.flv you want to convert. Click the "Add File" button , and then a pop-up window will display. Browse the directory and choose your Youtube videos, then click the "Open" button. Step3.Setting Click the "Setting" button on the bottom of the panel Set the video Encoder, Resolution, Frame Rate, Bit rate and audio Encoder, Sample Rate, Channels and Bit rate to get the best quality as you want. If you have no requirement about them, click the "Default" button. Step4.Edit the Youtube video.flv----trimming Hit the "Trim" button next to the "Add File" button. Drag the first slider on the timeline to a location to set the start time and drag the second slider to another location to set the end time.Click the "OK" button to save the setting of trimming. Step5.Start the conversion Click the "Convert" button. If you use the trial version, a window will pop up to remind you to register. If you want to continue to evaluate the program, click the "Order Later". The time to convert depends on the quantity of files you loaded and the speed of your computer. You can check the status by the progress bar.