Lesson & progress
How a lesson plays, when it counts as done and where the percentage comes from.
The lesson page
Video or text, the course outline beside it, the way to the next lesson below. Nothing more — a learning page with distractions is a learning page nobody finishes.
When something counts as done
The player reports the position while watching; a lesson is done when it has actually been played through. That is the difference from a checkbox you tick: progress shows what happened, not what someone claims.
The percentage is computed
It is the share of completed lessons in the course — not an estimate and not a bar that sticks at 90 per cent. Because it is genuinely counted, it also works as the basis for the certificate.
Interruption is the normal case
Hardly anyone watches a course in one sitting. The position is kept, and the next open lesson sits at the top on the next sign-in.