McKenna, possibly a YouTube downloader and a playlist like https://www.youtube.com/playlist?list=PL83BE388A2A15A7E1 - some are short, but many are hour or two long full lectures. and https://www.youtube.com/playlist?list=PLyhHqyVEk0F-k42F1nAh6...
(I didn't realise how many lectures he did; many of those I haven't heard, and many of the ones I have heard aren't mentioned in those playlists).
(For the unwary, "Alan Watt", Scottish conspiracy theorist https://archive.org/details/The_Alan_Watt_Collection is somebody else).