AI credits
AI session summaries use AI credits, which cover transcribing the lesson and drafting the summary.
When you run out
If you start an AI capture without enough credits, Teamlilit tells you straight away rather than letting the lesson finish and failing afterwards. The lesson carries on as normal; only the AI draft is skipped.
Getting more
AI credits are an add-on you buy from your billing page, on top of whatever plan you are on. See Add-ons and extras.

Recording and AI summaries are different things and are billed differently. Recording saves the video and uses your storage; the AI wrap-up transcribes the lesson and uses credits.