If only audio plays, use a converter like Handbrake to change the container to MP4, or update your media codecs.
Click the download icon, which will save the file to your "Downloads" folder. Download File NuHoangThamVong_02.mkv
Are you facing any issues with the download speed, or is the file not playing properly once downloaded? If you can tell me: you are using (Phone? Windows? Mac?) What error you are seeing If only audio plays, use a converter like