TV4

Note: Not to be confused with the TV4's of Sweden and Norway.

Background
TV4 was originated from the amalgamation of former TV station Garca TV and Polsat 2, and started broadcasting since 2000. It originally belonged to Polskie Media until 2013, which was a subsidiary of the Polsat Group.

1st Logo (2000-2006)
Visuals: On a digital blue/green background, we see four white 4's spinning near the center. They suddenly rotate into view and they settle, and after that the other ones fade out leaving the 4 that's pointing at the screen. Four black squares with the letters of "tv4", which are shown on three of them, fade in below the 4.

Variant: A winter/Christmas variant exists. First we see a blue sunburst background with various white stars spinning around, and the sunburst changes into various copies of the number 4, which then merge into one. The 4's standing on a snowy surface, placed against a blue/green light background. The TV4 squares fade in below. Above the 4 there's copies of the channel's name in various transparencies scrolling from right to left.

Technique: The background, the 4's rotating.

Audio: A digital theme involving a single C chord, with three short whooshes near the end that echo. For the winter variant, a Christmas-inspired, calming 4-note theme with a brief piano flourish.

Final Note
The normal ident was last used in 2004, however, the winter one was still used until 2006, when the channel changed their logo.

2nd Logo (2006-2007)
Visuals: 

Technique: 

Audio: 

3rd Logo (2007-2011)
Visuals: Unknown.

Technique: Unknown.

Audio: Unknown.

Availability: The only known show is Galileo.

4th Logo (2011-2013)
Visuals: Unknown.

Technique: Unknown.

Audio: Same as the previous logo.

Availability: Unknown.

5th Logo (2013-2015)
Visuals: Unknown.

Technique: Unknown.

Audio: Unknown.

Availability: None.