I looked at some of them and what I saw was very low level of unique words per lesson, and the words themselves are just common ones. For speeches like this the goal is to follow a simple, predictable structure, to use words and phrases that are simple and clear, short sentences, with some repetition involved. Also the verb tenses are kept consistent and simple. This way the speeches are easy to follow and are comprehensible by a vast proportion of the population.
That said, I’d agree that these TED lectures fall under level A2, B1.
You’re right. We’re using the Common European Framework of Reference for Languages levels (A1-A2-B1-B2, etc.) but in Lingq what you can see is "beginner 1, beginner 2, intermediate 1, intermediate 2, etc. ).
Well, they talk about learning process, education, etc. and maybe you’re not so familiar with that type of language in French? Or, if you have trouble with the listening part, maybe it’s because of the accent? I haven’t checked all the lesson but it seams at least part of the lecturers are not native French, even if they have a good pronunciation, there’s a difference in rythm, intonation, vowels pronunciation, etc. that makes it different from native French speach, and maybe you’re not used to that?
Thank you. I realized something very bad with my method, I never touched the grammar. I have started today with a good book called French grammar in context, and I began to feel that the dots are connecting with one another.
Well it’s normal native speaking at a normal pace, so probably B2 in listening. The language isn’t complicated but neither is everyday usage. C1 + is where we get into educated levels of material with advanced opinions and topics, so it’s probably B2.
The CEFR levels for language include reading, writing and speaking though, so an answer can’t be given.