While searching within Alexander Street Video Portal consider these search tips:
You not only can search transcripts, but documents (as images) as well.
You can use the main search bar at the top of the ASP interface to search for videos and other files. (If you are in the video or audio player, simply click on "Show Navigation and Search" at the top of the screen to open up the search bar and navigation again.) You may select a discipline to search, or you may search "All Disciplines."
Note that each discipline usually draws from more than one collection. To find out what collections are included within a particular discipline, click on a particular discipline from the "Disciplines" drop-down menu.
Say you want to listen to some washboard bands. "Washboard" is a fairly specific search term, so a basic search might work well. Below is a screenshot of search results for the word "washboard." There are over 300 results, and the top results in the list are relevant as they contain washboard music.
You could narrow the results further by selecting a discipline or disciplines from the left side of the screen. You might also want to narrow the search by Format (Audio) or Content type (Music recording). (Either will work; both will give the same results in this case.)
In the upper left hand corner, select the Discipline "Music & Performing Arts." Your search results will automatically update. You will get just slightly more than the number of results that there are for "audio" and "music recording." (So, almost all "washboard" results are music recordings.)
You can use the facets on the left to refine your search further if you'd like, or you can browse the current results for a recording that appeals to you!