private void openVideoActivity(String video) {
    Intent newActivity = new Intent(this, PlayerActivity.class);
    newActivity.putExtra("videoId", video);
    startActivity(newActivity);
}

final String videoID = getIntent().getExtras().getString("videoID");

val intent = Intent(this, NewActivity::class.java).apply {
    putExtra("EXTRA_MESSAGE", "Test 123")
}
startActivity(intent)

val message = intent.getStringExtra("EXTRA_MESSAGE")