There was recently a CCC talk [1] about sustainability of software,... there was mentioned, streaming a video is almost as toxic as driving 20 km forth and back.

For sure, this is super vague, but i guess it's still good to consider all those internet traffic. local internet-caching could be a good solution to keep things more regional...

1: https://media.ccc.de/v/thms-49-ber-die-nachhaltigkeit-von-so...