The French DELF/DALF (diplôme d’études en langue française (A2-B2) / diplôme approfondi de la langue française (C1/C2)) is the official French language exam that is taken to certify one’s level in the language for purposes such as studies/work.
Here are some excellent YouTube channels which provide mock situation videos, grammatical help and general videos about what to expect on the day:
FrenchSchoolTV: https://www.youtube.com/@FrenchSchoolTV
LearntoFrench: https://www.youtube.com/@LearnToFrench
French ‘N’ You: https://www.youtube.com/@frenchnyou
FrançaisavecPierre: https://www.youtube.com/@FrancaisavecPierre
A helpful channel of an English speaker who took the exam and her advice:
Alice Chance: https://www.youtube.com/@alicechance