The Media History Digital Library digitizes collections of classic media periodicals that belong in the public domain for full public access. The project is supported by owners of materials who loan them for scanning, and donors who contribute funds to cover the cost of scanning The collections feature extensive runs of several important trade papers and fan magazines including Photoplay. You’ll find more material and options at the Collections page. You can search this collection at this address: https://lantern.mediahist.org/
There are an almost infinite number of blogs on film. Here are a few well-known ones - all of which include links to other blogs. . . into infinity?