wow... a key technology for the metaverse is already here. "you will not be able to figure what is true and what is false".
In the DLD conference .. I have seen the future. Image Metrics -- a company in Manchester, United Kingdom -- following 10 years of reserach -- can capture facial expression and plug them into other images. The demo is very convincing... (one tiny problem: transforming video to the new image does take "over night." Still not on-the-fly... new chips will do that... amazing.)
See the presentaion from the conference here... full video -- look for the Monday 9:00 Andy Wood presentation.
or look at their web site: http://www.image-metrics.com/