I've been on both sides of this fence, as a newb and as an experienced player who just wants to collect the soldiery as quick as possible.

I find the happy medium that I'm comfortable with is - Just find a written guide or description of the dungeon or trial you are about to enter. It is enough - even for Titan Ext - to just know what attacks are coming up and how to avoid/interupt them. I dont expect someone to watch a half-hour long video on titan (which if is from MR Happy, would likely be the wrong class/job for you anyway since bard has far less to worry about).
With the very simple knowledge gained from a quick skim thru you shouldnt have any problems picking up the fight after just 1 or 2 tries, which gets your party a buff anyway