fix: Do not append query params quality=medium to videos that are about to premiere

Video premieres do not have `audio_streams` and they aren't `video.live_now == true` either,
therefore we skip the checks that are made for older videos (`if audio_streams.empty? && !video.live_now` closure)
if the video is a premiere.

This commit also adds the `microformat` field to the `info` instance
variable of the `Video` struct, since it's needed for the function
`Video#premiere_timestamp : Time?`. This is more like a quick fix than a
proper fix because in `Invidious::Videos::Parser#parse_video_info`,
`premiere_timestamp` is gathered from the `microformat` JSON Object but
is used to set the `published` hash key for the `params` variable.

The parsers and structs really need a rework :/

src/invidious/routes/watch.cr

@@ -129,6 +129,8 @@ module Invidious::Routes::Watch
     video_streams = video.video_streams
     audio_streams = video.audio_streams
 
+    # Videos that are a premiere do not have audio streams.
+    if !video.premiere_timestamp.nil?
       # Older videos may not have audio sources available.
       # We redirect here so they're not unplayable
       if audio_streams.empty? && !video.live_now
@@ -142,6 +144,7 @@ module Invidious::Routes::Watch
           return env.redirect "/watch?#{env.params.query}"
         end
       end
+    end
 
     captions = video.captions
 

src/invidious/videos/parser.cr

@@ -109,7 +109,7 @@ module Invidious::Videos::Parser
     params = self.parse_video_info(video_id, player_response)
     params["reason"] = JSON::Any.new(reason) if reason
 
-    {"captions", "playabilityStatus", "playerConfig", "storyboards"}.each do |f|
+    {"captions", "playabilityStatus", "playerConfig", "storyboards", "microformat"}.each do |f|
       params[f] = player_response[f] if player_response[f]?
     end