: In VLC, you can go to View > VLsub . It will automatically search for a matching subtitle file based on your filename and download it for you.
The file extension .mkv.mkv suggests a naming error; you can safely rename the file to end in just a single .mkv to avoid playback issues. Chainsaw Man S01E01 HD | STAGATV.COM.mkv.mkv
: Open the .mkv file in a versatile player like VLC Media Player or IINA . Right-click the video, go to Subtitle , and see if a track is already embedded. : In VLC, you can go to View > VLsub