OpenOffice and LibreOffice are great, but they can feel a little bloated especially on startup. If you're on Windows and want a lighter-weight office suite, check out Kingsoft Office Suite. You can do most everything that Microsoft Office offers but with less of a footprint.
With "My Queue" you can quickly save videos to watch later.
To add an item to your queue just click the sign next to the video.
Once you've added a video visit "My Queue" to start watching!