Most scholarly history today tends to reach far beyond the old "kings, queens & wars" narrative, delving into social, economic, demographic, cultural or technological development rather than just the headline political and military upheavals. But the way we compartmentalise the subject leads to such approaches often being shunted off into discrete realms of economic history, social history, cultural history etc, so that the undifferentiated "history" that's left can end up looking suspiciously like those kings, queens & wars that we though we'd escaped. And the problem's accentuated in an audio-visual format that thrives on drama and visual impact - TV history shares many of youtube's limitations, and even radio can be an unsatisfying medium.

MeatballDom's reply usefully points to a rewarding approach: rather than trying to bite off too much, looking at the context of a specific event or process from different angles can shed new light on it: "So x happened. What was happening with population, economic activity, technology or social relations that might have contributed to x happening in the way that it did and having the consequences that it did?" sometimes the continuities can be as revealing as the transformations: if w didn't change, something else must have caused x to happen. Sometimes that will mean setting your topic aside for a moment to explore wider or longer-term developments and conditions in connection with a particular theme. Another approach I find valuable (or a variation on the same approach) is to look at the behaviour of narrower geographical areas within your study area: great events might have played out on a national or international stage, but their impacts were experienced locally, and often in different ways, and how different areas responded in turn fed into wider development.

Without knowing more about your particular interests it's difficult to offer any specific recommendations: general histories tend to be unrewarding because they'll inevitably focus on some aspects and overlook others according to the author's focus or taste. For youtube presentations, I find academic lectures and panel discussions the most useful - the second especially, as it offers multiple perspectives and highlights areas of scholarly disagreement. But at some point you're going to dragged into the books and research papers, many of which are available online - and that's where you'll find in-depth answers and infuriating new puzzles to solve.