Live streaming to Youtube with Reflector 3 will require some more CPU power than simply using Reflector. This is because when this happens, your device screen is being mirrored and recorded by the computer before also being processed and sent to YouTube. We suggest a computer with at least a dual core CPU and 4GB of RAM for this. For best results, you will want to avoid using the same machine that is sending the live stream for viewing the live stream in progress.
If users are seeing buffering issues when viewing your live stream, it may not be related to your machine. These users may need to lower the video quality on the YouTube player by clicking the gear icon in the lower right corner of the video: