iSL Collective is a website with a wealth of free resources for English teachers and is worth knowing about anyway. They've recently also added a free tool that you can use to make quizzes for learners based on YouTube videos or your own videos. It's super-easy to use and there are a lot of examples on the site that you can also use if you don't want to make your own. You can choose from a range of question types and then send learners a link or embed the quiz on your VLE. Highly recommended!