A "short speech" refers to a brief talk or presentation that does not take much time. It is a concise way of conveying a message or sharing information without using too many words or taking too long to speak. Full definition
The measurement of expressed emotion in relationships between staff and service users: The use of short speech samples. (personalityresearch.org)
Jonathan Levine and Sir David Adjaye gave short speeches, introducing the speaker to guests. (blog.masterdynamic.com)
He was welcomed by Prime Minister Gordon Brown, Conservative leader David Cameron and Liberal Democrat leader Nick Clegg, in short speeches in the Commons chamber. (news.bbc.co.uk)