A YouTube search for "Hisense A5 pro cc video call" did not return precise results, but some can be suggestive of the possibilities. See for example

Title: Hisense A5Pro CC Review 3- Battery, Videos & Games | Eink Kaleido 1 handling fast scenes

https://www.youtube.com/watch?v=4KqASRsIWVw

Some would find those results jawdropping. I presume that Video Calls using E-Ink displays are now much more than possible.