The present paper focuses on the implementation and validation of audiovisual content, quality evaluation approaches in mediated learning. The main aim of the work is to identify and describe the mechanisms that the attributes of source content (and its encoding properties) influence the learning process and the involved emotional aspects in terms of Quality of Experience and Learning (QoE & QoL) parameters. Subjective sentiment analysis tests are implemented along with QoE /QoL evaluation parameters and perceptually-adapted QoE metrics in real-world mediated learning scenarios. The obtained knowledge would be very helpful while preparing and designing audiovisual mediated tutoring and/or broadcasted distance learning courses, but also in many other fields associated with multimedia quality of experience and sentiment analysis.