Our forums allows automatic embedding of media by converting media links to embed code. Supports Youtube, Vimeo, Imgur, Pastebin, Soundcloud [Bandcamp].
Supported media:
Youtube
Vimeo
Imgur
Pastebin
Soundcloud
.jpg, .png and .gif URLs
In other words just post a url and we should be able to automagically embed it in your post. :)
In accessories you'll find the Screenshot tool. (More options than a simple screencap.)
Clocks? There's got to be a ton of them, digital and analog ~ various screenlets, too. I'd look for an article/review and pick one ~ or do a search in Synaptic or the Software Center for clock/calenders, etc.