Bongino (former federal agent and TV/podcast personality) gives a very clear and entertaining overview of Spygate: the illegal use of government surveillance powers against an opposition political candidate (Donald Trump). I agree with Bongino that this is the biggest political scandal in the modern era, orders of magnitude beyond Watergate. But because the story is complicated and has been largely covered up (as much as possible) by the media, few people understand what actually happened. You can get the gist of it in 20 minutes from the video. (Real content starts @6min or so.)
As Bongino states, the factual claims in his talk can all be sourced from reporting by "mainstream" news outlets such as CNN, NYTimes, WSJ, or from government documents such as the declassified (2017) FISC report on abuses of surveillance powers. But you will not find them all in one place as you do in the video (or on my blog).
See Deep State Update (May 2018):
It's been clear for well over a year now that the Obama DOJ-FBI-CIA used massive surveillance powers (FISA warrant, and before that, national security letters and illegal contractor access to intelligence data) against the Trump campaign. In addition to SIGINT (signals intelligence, such as email or phone intercepts), we now know that HUMINT (spies, informants) was also used.
Until recently one could still be called a conspiracy theorist by the clueless for stating the facts in the paragraph above. But a few days ago the NYTimes and WaPo finally gave up (in an effort to shape the narrative in advance of DOJ Inspector General report(s) and other document releases that are imminent) and admitted that all of these things actually happened. The justification advanced by the lying press is that this was all motivated by fear of Russian interference -- there was no partisan political motivation for the Obama administration to investigate the opposition party during a presidential election.
If the Times and Post were dead wrong a year ago, what makes you think they are correct now?