In general,
when you are a party of the conversation, recording your conversation is legal in many countries or US states.
Refs:
1. Wiki:
Telephone recording laws
2.US:
Digital Media Law
If you really care about the privacy of your contacts, Plus! can help. You have a feature to automatically send a chat message when you start recording. In video call, you can even show recording indicator to your contact.
Simple steps:
1. Go to Preferences of recording
2. Check Automatically send a chat message notification when recording starts
3. Check Display recoding indicator
Hope this helps!
Attachment: 
