likes/dislikes: better fallback management

'.to_i64?' instead of '.to_i64' returns nil rather than raising
an exception when it's done on an empty string.

In some rare cases, rating can be equal to 5. In this case, the
value of player_response[videoDetails][averageRating] is an
Int and not a Float.

src/invidious/videos.cr

@@ -903,7 +903,7 @@ def extract_video_info(video_id : String, proxy_region : String? = nil, context_
     if likes_button
       likes_txt = (likes_button["defaultText"]? || likes_button["toggledText"]?)
         .try &.dig?("accessibility", "accessibilityData", "label")
-      likes = likes_txt.as_s.gsub(/\D/, "").to_i64 if likes_txt
+      likes = likes_txt.as_s.gsub(/\D/, "").to_i64? if likes_txt
 
       LOGGER.trace("extract_video_info: Found \"likes\" button. Button text is \"#{likes_txt}\"")
       LOGGER.debug("extract_video_info: Likes count is #{likes}") if likes
@@ -916,7 +916,7 @@ def extract_video_info(video_id : String, proxy_region : String? = nil, context_
     if dislikes_button
       dislikes_txt = (dislikes_button["defaultText"] || dislikes_button["toggledText"]?)
         .try &.dig?("accessibility", "accessibilityData", "label")
-      dislikes = dislikes_txt.as_s.gsub(/\D/, "").to_i64 if dislikes_txt
+      dislikes = dislikes_txt.as_s.gsub(/\D/, "").to_i64? if dislikes_txt
 
       LOGGER.trace("extract_video_info: Found \"dislikes\" button. Button text is \"#{dislikes_txt}\"")
       LOGGER.debug("extract_video_info: Dislikes count is #{dislikes}") if dislikes
@@ -924,7 +924,7 @@ def extract_video_info(video_id : String, proxy_region : String? = nil, context_
   end
 
   if likes && likes != 0_i64 && (!dislikes || dislikes == 0_i64)
-    if rating = player_response.dig?("videoDetails", "averageRating").try &.as_f
+    if rating = player_response.dig?("videoDetails", "averageRating").try { |x| x.as_i64? || x.as_f? }
       dislikes = (likes * ((5 - rating)/(rating - 1))).round.to_i64
       LOGGER.debug("extract_video_info: Dislikes count (using fallback method) is #{dislikes}")
     end