Just got this little gadget in the mail today.
It cost about $7 shipped when I bought it and it shoots decent quality videos and pictures. It stores them on a micro sd card for you to transfer and view it on your computer. I feel like it's going to be a useful thing for downhill runs or recording random things without having to go through my phone. I'll put up a sample video to give you an idea of what it's like. It DID take a long time to ship but that's what happens when you buy a cheap product straight from Hong Kong. Still, I think it was worth the 2+ week wait.
Here's the link to the product on eBay. If you need a keychain camera or want a cheap helmet camera I totally recommend getting one.