A time machine can take any form, since they are all fictional. In the award-winning short A Single Life, a woman discovers that a vinyl record can turn back the clock on her life -or turn it forward.
The moral of the story is that it's better to just enjoy life as it is, where you are now, since you don't want to relive the past, and you don't want to ruin the surprise of what's coming. This film by Job, Joris & Marieke was nominated for an Oscar in 2015, and has just been made available at vimeo. (via Tastefully Offensive)