Apps with 'Pop out video' feature

Vivaldi is extremely customizable, presenting a wide range of settings and built-in features designed to put the user in control.

Opera is an innovative browser that focus on implementing new technologies without dropping simplicity and ease of use, speed, and security; supporting and contributing to open web standards.

Amino is a social network where people can join communities for their favorite topics / fandoms and make friends.

Pops video elements as resizable windows, lightweight and powerful.