Won't assume you know -
Vimeo is like the high caliber version of youtube; no trolls, generally much higher quality user content, and no ads over your stuff. They do so many things right - but this little touch is great... they edit the < title > element of the
technical difficulties landing page to read VimeUhOh. V cute. UX geekery!
Another available feature that not everyone uses (boggles the mind - almost as much as folk not personalizing their twitter icon...) is the chance to choose a titlepage/thumbnail to present the video. Essential.
Nothing crazytime but I do keep a page at
vimeo.com/vimeo10engines/.