Alternative source for recodings

I tried Spectra 2021 Recordings - Spectra Spectra but videos keeps stalling after a few seconds. Are there other sources?

This could be a browser issue, I am using Chrome and this works well, What browser are you using? Do you have this problem with a specific video or is it for all the videos?

I never have problems with playing video in Safari on Mac, and was interested in the keynote. Never mind. Thank you for responding.