Do note: these aren鈥檛 a great option if you鈥檙e on Linux, since they no longer receive driver updates, and likely won鈥檛 work well on Wayland based systems due to that. You鈥檇 probably want to opt for an AMD Vega 56 instead for something that鈥檚 similarly powerful that can use the open-source driver, though I believe it鈥檚 a little more expensive.
Why does this need to be a video?
It was made by a youtuber for his subscribers, whom I also happened to be subscribed to, and found it interesting enough to share it.
If you can find someone who made an article along the same lines as the video, you could post it here in the comments for those who prefer not to watch videos :)
Under $40 is a bit of a stretch
I was basing that on what he mentioned at the end, but you鈥檙e right. Checking ebay, it looks like they go for around $80 buy it now, and around $50 w/ shipping for auctions.
Cheapest one I see is $117 + $30 shipping on eBay, so even that number is going to be regional.
True, PC part prices can vary dramatically depending on the country. The prices I mentioned are for the US region, specifically.