As the Octovid Player essentially loads video and audio files in real-time it is recommended you keep the file size to a minimum to ensure best playback for your viewers.
Recommended: MP4 video with low bitrate, small file size (ideally under 12MB and resolution of 480p or 720p maximum.
You can also use MP3 files for audio and JPEGs for video thumbnail posters.
It is possible to use custom fonts, please find more info here.