Broadly speaking, educational technology is primarily viewed as learning tools. But whenever we emphasize on the adjective "educational", we must however be clear about what we mean by the educationalness aspect of these technologies. Therefore, we shall consider that there exist a lot of conceptual problems associated with the particularly such an ambiguous loaded term. As an example, researchers use various keywords/concepts such as 'learning' aimed at saying learners are either learn:'via'; 'through'; and, 'with' educational technologies but not definitely 'by' them. Why? Because in the latter case; using the English proposition 'by' it means we have in somehow accepted these tools are able to teach learners automatically. However, at the end; it's only the learner who learn depending on manyfactors, each determining the ratio of her/his leaning curve. So, knowing which appropriate English proposition to use is of paramount importance. Inspired by Heideggerian approach to the notion of technology, which should concern us today as well, the main purpose of this paper is to discuss the"what" aspect of the learners regarding how they maintain their relationships with whatever educational technologies in use. It seems that these Teaching-learning tools such as YouTube has not been used effectively due to mainly the various learners, more or less, unawareness about how to approach the "essence" of these learning tools. To operationalize the Heideggerian approach to learning, his notion of the "essence of technology" will be discussed by using Technology, Pedagogy, and Content (TPAC) framework. Using such a framework will help us to discuss what and how learners manage their knowledge cognitively.