Sure. Here is my config to launch Prime Video.
alias: Start Amazon Prime
sequence:
- service: media_player.play_media
data:
media_content_type: custom
media_content_id: open prime video on fire tv
target:
entity_id: media_player.berkan_s_echo_dot
mode: single
icon: mdi:television
I am giving the custom command from another Ehco Dot through HA.