Pragmatics is a branch of linguistics that deals with language in use and the contexts in which it is used. One of the main kinds of contexts of use of language is communication. Communication consists of verbal mode, or language, and nonverbal mode, which denotes facial expressions, gestures, body language (position or movement), touch, eye contact, etc., in other words, anything that we can convey a message with that is not language in its written or oral form. This thesis deals with the use of hand gestures that occur in parallel with spoken words. Since linguists have mostly dealt with verbal communication, terminology for this mode is well-established, and terminology for talking about non-verbal communication needs to be adjusted from it. Most importantly, the nouns communicator and addressee are used whenever applicable, instead of speaker and listener. Another problem with terminology encountered in the scientific literature on gestures is the fact that different authors have different terms for the same phenomenon. A choice was made, and although there are up to four names for the same category of gestures, only one was used in the analysis. There are multiple classifications of hand gestures, but the simplest, most complete one, is a modification of Charles Peirce’s classification of signs. David McNeill adopts it, modifies it, and categorises hand gestures into: lexical, deictic, emblems, beats, and the so-called Butterworths. Six YouTube videos, or two groups of three videos in each, were analysed. The first group is online English conversation lessons with a teacher and her guest(s) as participants, and the second three are interviews, with the host and a famous actor as participants. The analysis has shown that the most widely used category of gestures is beats. What follows are deictic gestures. The most widely-used special kind of deictic gesture is the turn-keeping gesture. Less common are lexical gestures, followed by emblems and finally Butterworths.