来自www.usingmac.com
Download with Activity Monitor
Everything that is visible to eyes are downloadable and for Safari web browser, all files can be spotted insideActivity Monitor. Amongst all of files listed inside, there exists a file linking to the HD Video. To spot and download it, follow these steps.
- Open YouTube URL to video. Append URL with &fmt=18 to view HD video
- Show up Activity Monitor (Command-Option-A)
- Seek for file with largest size and Option-Click it
- The download should be started with default name video.mp4