About 13 years ago (maybe more, maybe less) I came across the same frustration as many: getting the hinges out of a GBA SP shell without marring, breaking, or forcing anything. There were a few disassembly guides then but that was always where they either fell apart with no good advice or they out-right threw their hands up and admitted that they couldn't help with that.
Determined to find a solution, I tried a number of things before finding a trick that worked great: taking the cone out of the tip of a Bic Round Stic ink pen, flipping it around, and pressing the back against the four clips to simultaneously squeeze the four clips and force them through (it's EXACTLY the right size). I shared this at a few places back then including Penny-Arcade, but this was before YouTube and it didn't seem to catch on.
A few years later I also shared it on DealExtreme/VolumeRate. Fast forward several more years and we were back to square one with tutorials on DIY/maker/fix-it sites and YouTube with no good way to remove the hinges. I went through Round 2 of trying to make this common-knowledge but it still seems that no one noticed then either.
A few more years and I mentioned it again in the comments section of a RetroGameTech video. This time I got a response that it worked great and got several thumbs up, so the info was finally doing some good for others. Great! My goal all along has been to make this to common-knowledge for anyone who needs to fully disassemble their GBA SP (typically moving to a new housing).
Yesterday I received a GBA SP AGS-101 backlit LCD that I used to refurb a GBA SP (thanks, NathanOfLight!) so I used the trick again. Curious to know if the trick had caught on yet, I did a Google search and found another GBA SP disassembly video. Sure enough, the video author mentioned it in the comments.
I replied thanking him for helping spread the word, but something was a little too familiar. Sure enough, I soon found a post of mine from Jan 2015 where I said the exact same thing word-for-word.
Now, I know that my stated goal was to make this common knowledge (not to go around demanding credit), so should I be irked by this? If I were successful it would be so common that the original source would be hard or impossible for most to determine. I guess what annoys me about it isn't so much that I'm not getting credit, it's that he copied it word for word without letting on that they weren't his words. If he had reworded it I wouldn't have been bothered by it at all.
At least he was careful not to copy the "I discovered..." part.