Should we expand our search to include lost political stuff?

There should be articles about all the lost political debates, speeches and material. Ive been getting into political history recently and trying to watch old stuff to get a feel for past political figures and our government's rise and fall over the years. It's been very interesting, but the problem is a lot of older stuff cannot be found. Not on CSPAN.com, youtube or anywhere else. Just off the top of my head, I cannot find JFK and LBJ's debate during the 1960 primary, or McCarthy and RFK's debate from 1968, or any of the debates from the 1972 primary. George McGovern's speech at the 1984 convention cannot be found in its entirety online either. Neither of the two VP nominees convention speeches of 1952 exist anywhere, while all 4 speeches from the nominees of both parties in 1948 (except Truman) exist only in short fragments. I cannot find Ted Kennedy's keynote address at the 1972 convention anywhere. While I have no interest in watching full conventions personally, it should also be noted that the full coverage of most past conventions is nowhere to be found either. And these are just a few examples off the top of my head. There are many more all through the years. You would think this stuff would be well preserved since it's our history but it isn't. Im honestly shocked to see there is not an effort on this site to raise awareness and find any of this material either. I think it is definitely worth our time and attention to create articles for missing political debates/speeches and conventions.