As discussed in the video, please do have a look through Electrum's documentation, particularly when setting up any multisig configuration outside of what's demonstrated here.
Download Electrum: https://electrum.org/#download
Electrum Documentation: https://electrum.readthedocs.io/en/latest/
Additional Helpful Documentation: https://bitcoinelectrum.com/creating-a-multisig-wallet/
My prior video on Ledger: https://www.youtube.com/watch?v=nX1Gtt4i3WY
My prior video on Coldcard: https://www.youtube.com/watch?v=1bBjLmTNyrc
My prior video on Wasabi where I also go through a full deep-dive on verifying PGP signatures for software downloads: https://www.youtube.com/watch?v=eVf795HUk94