First try the player's auto-translate: settings gear (⚙) → Subtitles/CC → Auto-translate. If the video has no subtitles at all, your phone or browser can write out what is said in real time. It runs on your own device: CanduCardio receives and stores nothing.

• Android phone: Settings → Accessibility → Live Caption (on many models a captions button also appears when you press the volume key). Some models, such as Pixel or recent Samsung Galaxy phones, can also translate them.
• Chrome (computer or Android): Settings → Accessibility → Live Caption. For some languages it can also translate them.
• Windows 11: Settings → Accessibility → Captions (or press Windows + Ctrl + L).
• iPhone, iPad or Mac: Settings → Accessibility → Live Captions (depending on language and model).
• TVs: almost none have this feature; use the player's auto-translate (⚙).