Many good scarce tips in there (once past Google Scholar, unless you're monopoly-oriented). 'Dealing with paywalls' for example.
He did mention IA searches, but I didn't spot a mention of their https://scholar.archive.org/ with "over 25 million research articles and other scholarly documents preserved in the Internet Archive."
For book metadata, I find https://openlibrary.org/ search has a lot of 'MARC' type data. Esp useful for books with many editions.
Some services are getting more restrictive. e.g. WorldCat recently got harder to use, rejecting many searches. But if you can find a book's OCLC ###, then https://www.worldcat.org/oclc/### works every time. Useful for finding local hardcopy if you've got your location turned on. (With an ISBN , WPedia will also do this for you at: https://en.wikipedia.org/wiki/Special:BookSources/ )
He did mention IA searches, but I didn't spot a mention of their https://scholar.archive.org/ with "over 25 million research articles and other scholarly documents preserved in the Internet Archive."
For book metadata, I find https://openlibrary.org/ search has a lot of 'MARC' type data. Esp useful for books with many editions.
Some services are getting more restrictive. e.g. WorldCat recently got harder to use, rejecting many searches. But if you can find a book's OCLC ###, then https://www.worldcat.org/oclc/### works every time. Useful for finding local hardcopy if you've got your location turned on. (With an ISBN , WPedia will also do this for you at: https://en.wikipedia.org/wiki/Special:BookSources/ )