How did you get them like that - is the first question. Did you rip a dvd using dvdshrink, or similar - these are just bog standard DVD rips
If you did there should be two folders one level up - AUDIO_TS and VIDEO_TS, those files your seeing should reside in the VIDEO-TS folder, the other remains empty.
No need to convert to anything - unless you want to - providing they are stored as described any software will play them, without modification.
for MB they should be in the format
Movie Name\AUDIO_TS and VIDEO_TS, then within the VIDEO_TS folder, the movie files.
If you want to you can convert to mkv using makemkv without burning to a disc, use the 'open folder' option.