A full JA concert on DVD (or on film, video or the net)?
The answer is simple: it doesn't exist. There is a rumour that all concerts in the Fillmore were filmed, so maybe Wolgang's Vault has a surprise for you in store (I haven't checked W's V. the last few years, because I got bored with sound board quality recordings). For whatever footage of JA concerts on film, check out the Jefferson Airplane Video Archive Topic on this site. Best of course are the Woodstock songs on Youtube, but sadly enough not all of the concert was filmed/released, because the camera men were just as tired as the band at 6 o'clock in the morning.
Of course there is the Jefferson Starship DVD of lousy quality (but you already know that one), but that too isn't a full concert, I think.
You'll have to do with sound recordings (bootlegs except Woodstock).