You describe a symptom of a high data/low effect situation that is pretty common these days.
The real question is what to do with the 50 minutes left after distilling the information down to 10 minutes. Just absorb more data or do something with it?
From learning point of view? Unanimously do something with it. Or at least see some examples of someone doing something with it to make you care about what you just learned. It's very high to remember a fact, as in commit to long-term memory, if there was no feeling attached.
The real question is what to do with the 50 minutes left after distilling the information down to 10 minutes. Just absorb more data or do something with it?