Here's my shorthand. Google docs. Nested by topic, use ldaps, use "AI (action item)" to assign tasks.
ldap1: This thing
* ldap2: No that thing
* ldap3: Because of this reason
* AI(ldap1): Fix that thing
ldap3: What about X?
* ldap1: I think X is at risk
* ldap2: We have an alternative from [this vendor](link)
...
* AI(unassigned): Investigate vendor alternative to fix X
Google Docs creates TODOs automatically around "AI(ldap)" and correctly attributes them.
If you're in a multi-stakeholder meeting, you can present the notes and even have multiple people backfilling with links, screenshots, etc.