Right-click the video > Audio > Audio Track to change the language. Go to Subtitle > Sub Track for captions.
This is a "watermark" tag indicating the source website where the file was originally uploaded. Right-click the video > Audio > Audio Track
The resolution. This is Standard Definition (SD), suitable for smaller screens or mobile devices to save data. Right-click the video > Audio > Audio Track
Tap the Music note icon for audio and the Speech bubble icon for subtitles. Right-click the video > Audio > Audio Track