I found a recent article that shared an experimental study of using screencast video feedback to undergraduate, university-level ESL students' writing samples. I will share the link to the article, as well as a summary of the findings and implications for practitioners.
Link to article:
https://www.researchgate.net/publication/304494225_Effectiveness_of_Using_Screencast_Feedback_on_EFL_Students'_Writing_and_PerceptionTakeaways:
1. Receiving feedback through screencast videos helped students reshape ideas
2. Receiving feedback through screencast videos helped students organize their writing
3.Receiving feedback through screencast videos helped students vary sentence structure
4. Receiving feedback through screencast videos was personal
5. Students found screencast videos helpful because they can go back and forth
6. Students found screencast videos helpful as they understand where they have lost marks
7. Students were aware of the encouragement and constructive comments provided by the teacher
8. Make sure video quality and sound quality are adequate
9. Loading times of the videos were a negative aspect
10. Students felt more engaged in the feedback process through screencast videos
11. Students wanted continued use of video screencast feedback
12. Make sure the teacher's responses are comprehensible, and at a speed/level where students can clearly understand
13. Time consuming for the teachers
Continued studies on this type of feedback would be beneficial, but overall it looks helpful for students and actually gets them to incorporate their feedback into future revisions.