LazyColumn.kt

val listState = rememberLazyListState()
val currentlyPlayingItem = determineCurrentlyPlayingItem(listState, state.items)

LazyColumn(state = listState) {
    ...
    }

...

private fun determineCurrentlyPlayingItem(listState: LazyListState, items: TweetItems): TweetItem? {
    val layoutInfo = listState.layoutInfo
    val visibleTweets = layoutInfo.visibleItemsInfo.map { items[it.index] }
    val tweetsWithVideo = visibleTweets.filter { it.hasAnimatedMedia }
    return if (tweetsWithVideo.size == 1) {
        tweetsWithVideo.first()
    } else {
        val midPoint = (layoutInfo.viewportStartOffset + layoutInfo.viewportEndOffset) / 2
        val itemsFromCenter =
            layoutInfo.visibleItemsInfo.sortedBy { abs((it.offset + it.size / 2) - midPoint) }
        itemsFromCenter.map { items[it.index] }.firstOrNull { it.hasAnimatedMedia }
    }
}