Anybody tried one of these...

https://stacksocial.com/sales/dashcam-hi-res-car-video-recorder-8gb-microsd-card?aid=a-jg4fpav0&utm_source=techbargains&utm_medium=post&utm_campaign=direct_dealdetail_Stack+Social_0104_107179

It's just a cheap dashcam, looks like a point-n-shoot camera, wondering if it might work through a scope. Need some way to mount it obviously, not sure about that but I'm sure it could be done. Has an 8gb microSD but takes up to 32gb. Quality is certainly a question, but for $25 (actually 10% less if you signup for their email list) might be worth a shot. You could always use it in your car.
 
How would you shoot your rifle if a camera is covering the scope? ...or are you talking about a spotting scope?

something like this could maybe work; http://www.ebay.com/itm/like/112083486441?lpid=82&chn=ps&ul_noapp=true

there are also a few options for smartphones like this one made for iPhone 6;

https://www.bhphotovideo.com/bnh/controller/home?O=&sku=1123588&gclid=CJX726DdqdECFQW1wAod50cD1g&is=REG&ap=y&c3api=1876%2C92051678762%2C&A=details&Q=

I don't think this would apply for your application, but I like mounting my goPro and SLR camera to my rifles using this mount;

http://www.mountsplus.com/AR-15_Accessories/AR-15_Scope_Rings/AFS-DLOC-C.htmlAlamo Four Star DLOC-C QD Picatinny Rail Camera MountDLOC QD Picatinny Rail Small Adapter - Accessory adapter
  • Universal ¼-20 holds DSLRs, Camcorders, Point-and-Shoots & Action Camera
  • CNC Machined 6061 Aluminum
  • Hard Anodized Type III – Flat Black
  • Fits all Picatinny Mil Spec and damaged or worn rails
  • Returns to Zero when removed
  • Combination ACORN and ATK Torque Knobs
  • Universal left/right side mount