Thanks for your post!
Please advise what file format is the video course you are trying to open with VOX?
Have you noticed any error notifications during the process?
Actually, VOX is an audio player, yes, there are various formats supported, still, video file formats may not play in VOX.
Here you can find the whole list of the supported formats:
- Uncompressed formats: AIF, AIFF, ASF, DSD, PCM, WAV
- The lossy formats are: AAC, M4A, M4B, MP1, MP2, MP3, MP4, MP+, MPC, MPP, OGA, OGG, OPUS, RA, RM, WMA.
- Lossless: ALAC, APE, DFF, DSF, FLAC, TTA, WMA Lossless, WV
- Playlist formats: CUE, M3U, M3U8, PLS, XSPF
- Specific Audio Formats: IT, MO3, MOD, MTM, S3M, UMX, XM, AY, GBS, GYM, HES, KSS, NSF, NSFE, SAP, SPC, VGM