Camera Video

Can you tell from an uploaded video what camera/video camcorder it came from?

Lets say i upload a video of me online and someone likes the quality and decides they want to buy the camcorder/camera/cell phoe that i own. Could someone figure it out?
*cell phone
what about with the help of some special program, if any exist?

If they have access to the original video and if the source stores that data within the file then yes.
For example, most digital cameras include lots of metadata with the pictures (lense used, f-stop, zoom, etc.).
It is very easy for the camera to embed that information in a digital video file.

octopus steals my video camera and swims off with it (while it’s Recording)

SVP Cybersnap 901 9MP 2.4-inch LCD Silver Digital Camera/ Video Recorder $57.69 The Cybersnap 901 delivers up to 12MP interpolated resolution images with a high end Omnivision CMOS image sensor. This camera’s 2.4-inch LCD monitor allows you to see the images and examine them in detail before and after you take a photo or video.

Lumiere L.A. 20W Camera Video Camcorder Light/ 2 NPF750 Batteries $108.49 Get outstanding lighting options with this lightweight, compact lighting kit from Lumiere L.A. This system is compatible with most digital cameras and camcorders, and comes with two rechargeable batteries, a charger and bracket.