I use this as fluency practice after I have taught simple combining like terms. The goal is for the students to be looking for like terms. Simply play as a slide show and it will play like a video. The students are to answer "yes" or "no" based on if the expression can be simplified by combining like terms.
This is a ppt file, but used like a video.
Wish it had something different??? It is completely editable by you once you receive it so you can...
1. speed it up or slow it down
2. simpler or more complex expressions
...to fit your students needs.
If you are not yet ready to use like a video, you could change the setting so you the teacher can control the slide.