I don't think its sold anymore, but I used to use a yi lite to record my games. Not the best quality but it did the job and was about $60. If you search action camera on amazon, there's quite a few options under $100, but I couldn't say if they're any good or not.

I recently picked up a gopro hero 9, it was $350 but the quality is much better. You might be able to find an older one elsewhere for ~$100.

When I play, I have a gopro suction cup attachment I use that I put on the inside of the glass behind me. I've recorded my games for about 3 years and it hasn't got hit yet!

I personally have a Hero3 I won five years ago in a video contest, Crosstour Action Camera I use for my rear on my commuter (when I remember to charge it). And for my race bike I have my Fly6(ce), but I will use it on my commuter if I forget to charge my other rear camera.

Here is a list of common ones:

Inexpensive (< $100)

1. AKASO Action Camera 1080P HD EK5000 amazon link

• Handlebar and Helmet Mount included, very low quality video

1. Drift Stealth 2 amazon link

• Low light is not great, otherwise fine camera

1. Crosstour Action Camera amazon link

2. Yi Lite amazon link

Mid Range ($100-250)

1. Contour ROAM2 Waterproof Video Camera amazon link

2. Yi 4K Action Camera amazon link

3. Garmin Virb Elite amazon link

4. Sony HDRAS100V/W amazon link

5. GoPro Session amazon link

High End ($250+)

1. GoPro HERO5 Black amazon link

• Really, any of the GoPros will probably do very well. They aren't know to have the best battery life, though

1. Fly12(ce) camera and front light amazon link

2. Xiaomi Yi 4K Action Camera 2 NIS Store link

3. Fly6(ce) Amazon link