Lost media is always a fascinating topic and it's obvious it's quite a popular one online. Whenever it's discovered some piece of media may have become lost to the annuls of time people will try and see if they can find any way of recovering it, be it because the media in question holds some kind of value, or human curiosity gets the better of us and we just simply want to find out if said media was even worth finding after some people made a bit of a big deal over not being able to find it anymore.
Unnus Annus by YouTubers Markpiler and Ethan (aka CrankGameplays) is one of the only examples I can think of that can be called "intentionally lost media" as the channel was an experiment to create lasting memories even when the physical (or digital) forms of something are gone. Now yes the fact Mark and Ethan made it clear from the beginning the channel would stop existing after one year means it's highly likely some people backed up every video they made, even if that goes against the intended purpose of the channel, but fact remains Unnus Annus as it was is gone and will never return. I think Mark and Ethan also said they do not want people re-uploading to YouTube (I could also swear I recall Mark said that if re-uploads are made he will have no choice but to issue a takedown). As such this is media that is intended to stay "lost" on purpose.
So yeah this got me thinking, do there exist any forms of media out there that are considered intentionally lost? Like did a famous musician ever make only one CD of an entire album, play it once at a party, and then destroy the CD and erase and/or burn all the master records right after? (I know there was that whole controversy where that scumbag pharmaceutical CEO bought the only copy of a Wu-Tang Clan album just to have it all for himself, but there's still a possibility the recordings may exist elsewhere or one day someone richer than him buys it off him and finally just leaks the music online) Did Banksy ever announce somewhere that they made and destroyed a large painting before anyone ever had the chance to see it? (I could see that happening as remember Banksy did that whole thing where they purposefully shredded a painting they made right after it was sold at an auction) Just super curious now.