As far as lecture recording, most schools probably have this capability on a professor by professor basis. The attendance policy would also probably vary school by school and class by class.
At Illinois, all the lectures for our core curriculum are recorded, but electives and labs are not (in some cases, labs can't be recorded due to hands on aspect). We also do not have an overarching attendance policy. However, some classes have unannounced clicker questions or group work, depending on the year. Labs are mandatory attendance for obvious reasons, particularly 2nd and 3rd year. Electives generally base 50% of the grade on attendance.