YES. Camcorders are allowed in the Czech Republic, SK, PL and other European countries. However, such recordings should only be used for private purposes, or to clarify a traffic accident or offense to the Czech Police, or other misdemeanor to the relevant authorities or courts.
Recordings, especially of license plates and faces, can not be publicly published through the Internet on sites such as YouTube, Facebook or other social networks.
The situation is different in neighboring Austria where, due to strict privacy legislation, video footage is explicitly prohibited whilst driving under threat of a fine.