Update ffmpeg URL

Author: mrousavy

FFmpegManager/FFmpegHelper.cs

@@ -10,7 +10,7 @@ internal static class FFmpegHelper {
         internal static string Documents = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
         internal static string FFmpegDirectory = Path.Combine(Documents, "ImgurSniper");
         internal static string FFmpegPath = Path.Combine(FFmpegDirectory, "ffmpeg.exe");
-        internal const string FFmpegUrl = "http://ffmpeg.zeranoe.com/builds/win64/static/ffmpeg-20170425-b4330a0-win64-static.zip";
+        internal const string FFmpegUrl = "https://ffmpeg.zeranoe.com/builds/win64/static/ffmpeg-20190502-7eba264-win64-static.zip";
 
         internal static bool FFmpegInstalled {
             get => File.Exists(FFmpegPath);