One of the greatest things that you can find on teh internetz when trying to decide your class in MMO are videos. Youtube is full of them (duh). However what I think people are really interested in is seeing how their class of choice will be performing in day-to-day playing sessions and not necessarily in high end dungeons and raids.
This is why I have prepared video showcasing assassin gameplay along with, what I think are, somewhat helpful descriptions and commentaries so the viewer can at least have basic understanding of "what the fuck is going on (TM)"
As a bonus I have my two old old videos from 1.4 and 1.5 eras. See what I´ve become? I haven't become better at editing videos that is for sure :X Make sure to switch to 480p in video quality settings.
Assassin solo gameplay in 1.4 patch - Hybrid build
Assassin solo gameplay in 1.5 patch - Lotus build (at that time Hybrid was heavily nerfed)
Assassin solo gameplay in 4.0 patch - Hybrid build