Yes along the lines of Anthology or Crossfire Hurricane. I think Chill one major problem about Led Zeppelins legacy at least in the UK is that the urban myths such as the Hammer of the Gods book has never been balanced with the magic they obviously had through old clips appearing on the Old Grey Whistle Test compilations. Look at Bowie playing Queen Bitch with the Spiders from Mars which has more meaning with every passing year. Curtiss Mayfield, The Allman Brothers and Bob Marley all captured on video for new audiences to discover. Their reputation suffers because of this. Add to the lack of quality first hand documentaries and only 6 music playing them on a regular basis they are on the back foot showing the world just haw great they were. Even Pink Floyd who had a reputation for being reclusive have had BBC 4 retrospectives.
Not doing TV gigs maybe was the correct thing to do at the time but has left them out on a limb now. Floyd, The Who, The Kinks, Bowie The Beatles and Stones are regulars reminding the public of their worth. Zep need a coherent and first person account from all remaining members and have the hardest mythology to overcome.