[Video] Lexicon implementation (#4881)

* implement AppBskyEmbedVideo lexicon in player

* add alt to native player

* add prerelease package

* update prerelease

* add video embed view manually from record

* fix type error on example video

* black bg + use aspect ratio on web

* add video to feeds

* fix video overflowing aspect ratio

* remove prerelease package

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Co-authored-by: Samuel Newman <10959775+mozzius@users.noreply.github.com>

src/view/com/post-thread/PostThread.tsx

@@ -428,6 +428,7 @@ export function PostThread({uri}: {uri: string | undefined}) {
         (item.ctx.depth < 0 && !!item.parent) || item.ctx.depth > 1
       const hasUnrevealedParents =
         index === 0 && skeleton?.parents && maxParents < skeleton.parents.length
+
       return (
         <View
           ref={item.ctx.isHighlightedPost ? highlightedPostRef : undefined}