The experiment of capturing speaker slides using $15 HDMI capture card ended in utter failure -- the card scales down 1080p signal to composite (500x700px) and everything looks bad.
Here's a teardown that I've should have read before buying -- https://www.youtube.com/watch?v=pS3FOJ5qZSA
I want to try out EZCap 261M, I like this particular model because it has MIC in port. or EZCap 261 which seems to be more popular. These cards cost about $90 CAD.