I have written often about how including a google form to track student qualitative and quantitative reflection of instructional videos has made all the difference in my class. The below video provides an example of this process (note: there is a numerical mistake in the example problem shown and I no longer encourage students to chunk the video up into parts while providing the summary. I have found that asking students to reflect upon entire video encourages more synthesis and critical analysis):

Recently I stumbled upon a research Meta-Analysis and Review of Online Learning Strategies provided by the U.S. Department of Education that validates this reflection mechanism. Below is a screenshot taken from the report: