So, what do these sites do? Well, they allow you to take videos, either your own or from youTube (because who likes to recreate the wheel) and embed questions into the video that student (or faculty if at a meeting...) have to answer.
This helps with the formative assessment process in an amazing way:
1) Students like video, especially short and sweet ones.
2) Students like to interact with video
3) The teacher gets to check as students are going through the lesson how they answered and give immediate response and intervention if necessary
4) Teacher can use the data to see how to proceed
5) These videos <embed> in many different sites. I use Goformative.
OK, so the feedback here? Students loved it. I mean they loved it and responded better than with other tools I have used in the past. They stayed more engaged and payed attention. They had to pay attention to since if they didn't they'd have to go back, review, and then answer the question.
Right now I use the free Zaption service. The paid service is a little steep for me right now, but the paid service offers other features such as requiring students to answer a question before advancing on. There are workarounds to this, but still.
Which one is better? Check them both out and see what you like. They have different features and the interface is slightly different. Choose for yourself and make it happen! I like the idea of what these can do for faculty meetings before we do a sendoff!