Everyone wants to understand fluent speech and sound natural. From my experience and according to science speaking and listening go hand in hand.
Here is one suggestion: course book videos. They are videos specially made for an English course book. Just browse some famous English course book, add a level and look in a video search. For example, New English file pre-intermediate videos and New English file elementary videos.
And keep in mind that you might know all the vocabulary from these videos, but our goal here is to catch natural speech patterns, so can be useful for higher level learners too! ⬆️