Personally, unless I’m quering something that’s fairly narrow, for recommendations you push to me please never show me anything older than 36 months. No, I don’t want an 8 year old video on this topic.
And for age, it is also fairly normal to listen to music older then 36 months. And to watch educational videos older then that. Or crafting videos older then that. Or tutorial videos older then that. Most of time, I am cool with old videos.
They are. People that started with the genuine intent of sharing their knowledge gradually turned into professional youtubers, and now it's all about hacking the algorithm, diluting content in multiple videos, selling you to their sponsors. Older videos are almost always better.
For framing, the first thing everyone recommends is “Framing Walls with Larry Haun” (1992). You even get the VHS tracking blips now and then from the video capture.
To be fair it’s also good advice to then supplement Larry Haun’s videos with modern framing techniques but his videos are the first one should watch.
Might just be a single example but it’s the first counterpoint that popped in my head.
These are easy and solved already. Apply exponential weighted average for length since watch for sorting, with two peaks of a month ago and a year ago.
I fear the YT folks have a hot mess and it will be twitterized at some point (the new tech lobotomized).