Here's a WebAssign course template I put together containing a variety of assignments you may find useful and are welcome to copy. If you want, send me your Username/Institution and I will add you to the course as an "Instructor" for you to copy the whole course.
A sample of assignments in this course include:
PowerPoint - Embedded
Video with Embed (YouTube & Edpuzzle)
Video with Recording Embed - With Webcamera IO
Problem Solving - Show Work, Pencil Pad, Whiteboards