A few more experiences with using the session transcripts file
The great thing is that the hyperlinks also work in the PDF version
It turns out the hyperlinks in the PDF file for some reason work with the Adobe Reader, but not with Foxit Reader. With all the browsers, the PDF hyperlinks are fine.
In a browser, the direct link is faster than the PDF
Having the PDF, I decided to compare the search speed in the browser for the direct link vs having the PDF loaded in the same browser. It turns out the direct link is much quicker, but if it really makes a practical difference is another question.
How to use the full reader search option in the Adobe Reader
With Adobe you can do an advanced search. It will give you the number of hits, list them all in sequence, bold the word it has found and give a few other words to indicate the context in which the word appears.
In Adobe, click Edit, click Find. In the dialogue that opens to the top right box, click the black down arrow next to the search field, click "Open Full Reader Search". Next, the extended search box opens. Type in your search word, and click Search. You will now get a string of results with links. Here is what it looks like, beginning with the extended search box.

And the result:

Notice you can scroll down through your results, and if you hold the cursor over the link to the result, you can see on what page in the document it is found. When you click a link, it will show the word in the Adobe Reader window.
If you use a browser, Firefox has an advantage when searching large files
If you use a browser to search the file, one advantage of Firefox is that, you can scroll down to say the middle of the document and search from there, just as one can do with the PDF readers. With browsers like Edge, Chrome etc., it will give the number of hits, but one apparently has to move from hit to hit sequentially, at least I have not found a way to work around the demand for sequence, though you can press < and begin from the end of the document. If a search only gives 25 hits, it is no problem clicking, but in the search for "child", there were 439!
Conclusion
The PDF hyperlinks may not work in the Foxit Reader
The Full Reader Search on Adobe Reader is the best, as it can give context too.
Firefox allows you to search a document from where you want to begin
Browser searches from the direct link load faster than from the PDF. If it really makes a difference, is another question.