Availability of logic lectures online I am currently reading Logic an Structure by Dirk van Dalen (2008).
However, I am missing some basics I try to find related lectures on online / on youtube. I frequently watch MIT, Stanford, and University of Nottinham lectures on youtube.
However, I have a hard time to find lectures on topics like predicate logic, high order logic, and  intuitionistic logic. Does anyone happen to have pointers?
Thanks.

MIT is certainly good, I don't know what your level is but I personally prefer summer school courses: they are shorter and more condensed, so you may learn more in shorter periods of time. Plus they are addressed to a general audience. 
When you search on google, try to add key words like "summer school", "winter school". Take a look at this lecture by Alwen Tiu, for instance.
More generally, I think that for very basic notions, books are better.
