Android phones, apps and tablets

If you can find a usb port.. they're normally non existent or impossible to reach.

If I'm missing something obvious please tell me, I always pack a Chromecast but rarely manage to use it.

Just checked into a hotel in Essen. TV has side facing HDMI so is reasonably accessible to plug in a stick.

Totally get what you are saying though as many TVs have rear facing HDMI and are wall mounted so there isn't room for a stick.

This is why these are useful:

https://www.amazon.de/-/en/Right-Angled-90-Flat-Extension-Female/dp/B019M5BMX2