I remember seeing the first few seconds of a deleted youtube video from 2018 that has never been reuploaded (as far as i know), the video was called "Ice cream!" and was from this youtube channel here
Do you know in Dish Network they have Disney Channel Interactive Games on their cable provider. Most of the games were lost except one game was partially found it was The Suite Life of Zack and Cody. Most of other Disney Channel shows like Kim Possible and American Dragon: Jake Long were completely lost on this day! hopefully Dish Network and users will uploaded this on YouTube.
I saw some of the lost Foster's Home teaser promos back before the show aired. Ironically, the ones that still exist now are the ones I didn't see growing up. Hah.
So, for me, it was a very strange short film that was broadcast on OCS late at night, between 1 am and 2 am, in the middle of August 2019. What's also odd is that the short film in question started after a brief commercial break without any context. It was a silent short film featuring a child with his father, who seemed to be a circus artist, as you could see him in his dressing room or small mobile home with his son removing his clown makeup. I have few memories, but I do recall that there was a relatively eerie atmosphere with it, and the late hour might explain that.
I searched for this film for a while without success, unfortunately. I even checked the broadcast schedules of the channel in question, but found nothing.
I legitimately don't know if this is a false memory of mine or what, but i vividly remember watching the Jeff Jarrett Global Force Gold video before it got deleted. It was filmed with a cheap webcam, Jeff was wearing a suit in his office and there was a very basic slide show of pictures explaining all the payment plans. Oh, what i'd give to see it again.
I have seen some lost media in the past. Here is a list of lost media I've seen in the past:
Phineas and Ferb Spot the Diff when it first premiered in 2008.
The original broadcast of Cartoon Network Invaded in it's entirety (I'm not sure if the full May 28, 2007 airing of all 5 episodes is up online.)
A time when I saw an episode of 2 Stupid Dogs when Cartoon Network reran the series in 2011 with a Spanish dub layered over the English audio (I only got to see the intro though before turning off the TV because I thought the SAP audio is turned on.)
A Lego Legend of Chima 4D attraction when it was playing at Legoland Florida in 2013 (I don't know if footage of the short is up online. All I remembered is that there is a running gag involving a skunk kid spraying musk and a green light glows during those gags since it's a 4D show.)
A clip from the now-underated and forgotten Power Players show on Cartoon Network (I remembered it being a clip from the Halloween episode and it was uploaded through Cartoon Network's Youtube channel for like 4 days before being taken down and that it's a somewhat early version of the episode with random toy images they got off the internet as placeholders in the background. I even saw Rescue Pack fro Go Diego Go as one of the toys in the background.)
The bizarre Elsagate video where Maleficent give Elsa a poison apple and Spider-Man calls Doctor Captain America to check what's going on and Doctor Captain America slips on the apple and knocks out Spidey and that there is a dance scene at the end I touched upon this lost video in a Unidentified Media post.
Several original broadcasts of Cartoon Network shows during Fridays, Fried Dynamite, and Har Har Tharsdays' run (most of those recordings of original premieres of new episodes of shows are not up online meaning bumpers from both blocks are still lost.) I even saw the first Har Har Tharsdays block on June 5, 2008. I remembered seeing a different intro to the block where characters from Chowder and The Marvelous Misadventures of Flapjack are balls rolling down. This version of the block was used for 1 month from the block's launch on June 5, 2008 to I believe July 17, 2008 as the Noods era debuted that week and the new intro for the block began use the following week. Granted though, I've only seen the original airing of the Chowder epsode "The Vacation/The Sleep Eater" and never the original premieres of Flapjack and Total Drama Island, but I remembered seeing the Fall era intro to the block. While the full theme song for the Fall era intro is up online, and the split-screen credits for the Fall era version of the block is well documented because Har Har Tharsdays still use these split-screen credits after the Noods era began up until later that year, the original Fall era of the block is not currently online right now.
Ditto to the original premiere of the SpongeBob episode "All That Glitters/Wishing You Well" with the error where the beginning of "All That Glitters" played again causing "Wishing You Well" to start 2 minutes in to the episode.
I was positively glued to the television as a child with a special interest in Cartoon Network specifically. Missing content from CCF or CN City, Noods bumpers.. likely so much interstitial material from 2005-2011 that is now considered lost. Similarly, Disney Channel's lost wand interstitials as well.
I spent a ridiculous amount of time playing Gorillaz' Escape To Plastic Beach game as well. I felt absolutely heartbroken to discover it was lost.
How about you? How will you live a life that faces death?
Man I used to play loads of those VeggieTales flash games as a kid, really hurt to see that a bunch of them are now missing. Luckily my favourite one, Larry's Wild Water Ride was saved!
I'm not sure if this counts (you did say "previously lost media counts"), but before it was lost, I saw the George Lopez/Dora ads many times on Nick at Nite. That being said, while the search was ongoing, I seem to have been one of the only people on the internet who remembered the "and they say I've got a big head!" part. Which is weird, because that part stuck out to me more than anything over the years.
I've seen a lot of content since my childhood, mostly from the Internet, while some of them became lost media. Here's my list of the lost media that I've ever seen, as far as I can remember:
CamHead, Daniel Walterbury and Willy Freebody's videos from YouTube
Content from Brosta.tv (defunct Japanese entertainment website that featured a variety of user-generated content)
There are article requests for them, while I made some.
pretty much any piece of vocaloid lost media. specifically scapegoat-p, masa, and hosaka1988's stuff. i knowwww i had some of their stuff that's now lost bookmarked on an ancient computer somewhere :sad:
aha! i need your help-- so, fancy a trip in the tardis?
A Lego Legend of Chima 4D attraction when it was playing at Legoland Florida in 2013 (I don't know if footage of the short is up online. All I remembered is that there is a running gag involving a skunk kid spraying musk and a green light glows during those gags since it's a 4D show.)
I don't know if this was brought up already, but a recording of the 4D film was uploaded to YouTube on June 12, 2018 by shyguy, running for 12 minutes 7 seconds.
Not sure if this counts since it's been found in its entirety, but I remember watching "Out of Jimmy's Head" when it aired. I have very vague memories about an episode with a roller coaster/amusement park inside of a house. It stands out to me because I REALLY didn't like watching it, lol