Roku

Background
Roku is a brand of hardware digital media players manufactured by American company Roku, Inc. The first Roku model, developed in collaboration with Netflix, was introduced in May 2008. Roku devices are considered to have popularized the concept of low-cost, small-form-factor set-top boxes for over-the-top media consumption. Roku has also licensed its platform as middleware for smart TVs.

1st (known) Screen (July 2011-March 2013)
Screen: On a black background, we see the Roku logo in. The letters of the logo bounce one by one.

Technique: CGI.

Music/Sounds: None.

Availability: Extinct. Was introduced with the second generation of Roku products.

2nd (known) Screen (Custom TCL variant) (Late 2014-)
Screen: On a diamond-pattern background, we see the the TCL logo and the Roku logo in white, with a dot in between both logos.

Technique: None.

Music/Sounds: None.

Availability: Current. Appears exclusively on TCL branded Roku TV sets.