Devices like the iPod Touch or older Zunes.

The Ultimate Guide to HD Movies on the Go: Why the "50MB Portable" Format is a Game Changer

You can fit an entire library—hundreds of movies—on a single 32GB thumb drive or phone.

In an era of 4K streaming and gigabit internet, the search term might seem like a relic of the past. However, for commuters, travelers, and those with limited storage or data, high-compression portable video is more relevant than ever.