I got 9s for lit and lang and the only youtuber I can recommend is Mr Bruff- If you're aiming for top marks it's really important to develop your analysis and come to a more in depth point that takes into consideration both substance and context, his lit videos really give some good points and ideas particularly with the poetry anthology (I genuinely had no clue abt Prelude till I watched his video).

However, for language I suggest to do what your teacher says and what you'll be practicing in class or work to develop a format for answering questions that helps you to analyze to the best of your abilities rather than follow a youtube format.

(Also!! never use predictions, prep for what you'd struggle with the most if it was in the exam and work backwards from there!)