Verified answer

NOt yet. When it happens only forward Travel and return, the past has already happened.

A few years ago 'The Farside" comic strip showed two scientists working on their time machine." If this thing worked wouldn't we have come back to help?"

Sorry I do not watch Youtube videos. I do however believe that barriers can be broken or bypassed. With the introduction of Quantum Theory there seems to be an alternative to the slowing of time by approaching the speed of light. Experiments are showing that we can influence objects simultaneously without seeing a time lag over extraordinary distances.