This is an intresting thing to do, and I managed to do something about it by myself, first of all you will need a good camera, able to record to atleast 120FPS then Import that video at 120FPS, slow it down to 60FPS and you will have that 60FPS LivePlay video.
Obviously this has a clear problem, if it is live you cant interact with people, you could manage to do something like when the video ends you get out of view and then when the video ends the stream goes "real live" and you get back on sight.
Also, if people see weird movements they will ask for a clock, maybe a pendulus and so on, it can be solved by maskin a certain area of the video and croping it to normal speed.
It's a headache to do that stuff ngl.