videos: Fix some bugs

src/invidious/jsonify/api_v1/video_json.cr

@@ -93,7 +93,16 @@ module Invidious::JSONify::APIv1
               json.field "itag", fmt["itag"].as_i.to_s
               json.field "type", fmt["mimeType"]
               json.field "clen", fmt["contentLength"]? || "-1"
-              json.field "lmt", fmt["lastModified"]
+
+              # Last modified is a unix timestamp with µS, with the dot omitted.
+              # E.g: 1638056732(.)141582
+              #
+              # On livestreams, it's not present, so always fall back to the
+              # current unix timestamp (up to mS precision) for compatibility.
+              last_modified = fmt["lastModified"]?
+              last_modified ||= "#{Time.utc.to_unix_ms.to_s}000"
+              json.field "lmt", last_modified
+
               json.field "projectionType", fmt["projectionType"]
 
               if fmt_info = Invidious::Videos::Formats.itag_to_metadata?(fmt["itag"])

src/invidious/videos/parser.cr

@@ -159,10 +159,10 @@ def parse_video_info(video_id : String, player_response : Hash(String, JSON::Any
   # We have to try to extract viewCount from videoPrimaryInfoRenderer first,
   # then from videoDetails, as the latter is "0" for livestreams (we want
   # to get the amount of viewers watching).
-  views = video_primary_renderer
+  views_txt = video_primary_renderer
     .try &.dig?("viewCount", "videoViewCountRenderer", "viewCount", "runs", 0, "text")
-      .try &.as_s.to_i64
-  views ||= video_details["viewCount"]?.try &.as_s.to_i64
+  views_txt ||= video_details["viewCount"]?
+  views = views_txt.try &.as_s.gsub(/\D/, "").to_i64?
 
   length_txt = (microformat["lengthSeconds"]? || video_details["lengthSeconds"])
     .try &.as_s.to_i64
@@ -270,7 +270,7 @@ def parse_video_info(video_id : String, player_response : Hash(String, JSON::Any
   license = nil
 
   metadata.try &.each do |row|
-    metadata_title = row.dig?("metadataRowRenderer", "title", "simpleText").try &.as_s
+    metadata_title = extract_text(row.dig?("metadataRowRenderer", "title"))
     contents = row.dig?("metadataRowRenderer", "contents", 0)
 
     if metadata_title == "Category"