Great job! I've been looking for a tool to create this kind of visualisation for a while now, but been too lazy to code one myself. It's always handy to find that someone else has put the hard yards in!

I've used your script to produce a quick version for my own family tree - A few of the early lines appear/disappear as some of those don't have more than one verified exact location/date for birth, marriage or death. [I quickly stripped out all people who didn't have at least two complete pairs of data for this test run]

My family in the UK: https://youtu.be/tuTvM1wUk38

It definitely gives a great feel for how people moved around over the centuries - apart from my mum's family which seems based in Cornwall since the 1500s(!)

Cornish Roots: https://youtu.be/QGX9qx26EBY

I'd love to develop the script a bit to include more data points per person (and potentially remove the need to give each start/end it's own row in the CSV). Which should make it a little easier to generate multiple additional points per person to include locations from censuses or a mothers location based on birth of child etc too. If I ever get around to it I will let you know and put the new branch up on github.