I once had a keychain video camera. It only cost $10.00 but the SIM card not included. That camera was destroyed from an on the pad engine CATO. I ended up buying the Estes video camera back when they had a 50% off special. It now sells for around $50.00. The quality of the video and audio are very good.
I highly recommend the Estes astrocam. I got mine for $35 on Amazon and you can get it for about the same price at AC Supply. Great video and sound quality and super easy to use. Only weighs 12 grams too.
I have been using GoPro's for the higher end stuff. They just announced a new model (the Hero 12) so you can usually get the older ones for much less. And I have also had really good luck with with the
s. :I have a RunCam 2 and its great. You can usually get them for around $80.