Security cameras: Animations aren't the best way to go here. Instead, have one frame where your camera is pointing to the right and the origin is in the middle of the camera itself, then use the Sine behavior on that object to alter its angle. There are a lot of settings there where you can change how far it turns, how fast, etc.
Path movement: There are a lot of ways you can do this. One simple way is outlined below:
1. Give the enemy the CustomMovement behavior(remove the pin behavior, too).
2. Have four invisible sprites representing up, down, left, and right.
3. Give the enemy some intial speed through the custom movement.
4. When the enemy collides with one of the direction sprites, adjust his speed to move in the associated direction.
5. Place your direction sprites such that your enemy will essentially "bounce" from one to the next until he finds his way to the original position, at which point he starts all over again.
There are ways to achieve more complex path movements, and ways to do it using fewer direction sprites, but I feel this provides a good visual explanation of one method.