As much as I love physical media, the music industry and how people consume media has completely changed the last couple of decades. Financially there isn't a big incentive for Maiden to record a show the way they used to, edit it and release it physically. For TBOS (IIRC) they used footage that was played during the show anyway, the close-ups of the various members, which resulted in continuity errors with guitars etc.
They record the audio of all shows anyway, so they have more leeway as far as that is concerned. Now, in the age of TikTok, Instagram, etc. we'll be lucky if they'll release a live album online like they did with TBOS. At least for LOTB we have some pro-shot concerts.