This qualitative descriptive research aims to describe the occurrence of code-mixing in the videos of the Londokampung YouTube channel from October-December 2021. The data for this research were the characters' speeches based on the videos broadcasted on the Londokampung YouTube channel from October-December 2021. The research data was obtained by using the observation method and noting technique. The primary and advanced techniques employed were the recording and the observation non-participatory technique (SBLC), respectively. At the data analysis stage, the distributional method was utilized along with the Segmenting immediate constituents (BUL) as the primary technique and the replacement technique as the advanced technique. The results of the data analysis were displayed using an informal presentation. The results indicated that there were two types of code-mixing, namely internal and external code-mixing. Based on the videos uploaded in October 2021, there were 29 internal and ten external code-mixing data. During this period, there was no data concerning the insertion of nouns and numbers for the internal code-mixing type and the insertion of nouns, numbers, basters, repetition of words, and clauses forthe external code-mixing type. In the videos uploaded in November 2021, there were four internal and one external code-mixing data. In this period, there was no data in the form of insertion of nouns, adjectives, verbs, adverbs, numbers, phrases, repetition of words, and clauses for internalcode-mixing type and the insertion of nouns, adjectives, verbs, pronouns, adverbs, numerals, phrases, baster, repetition of words, and clauses in the external code-mixing type. In the videos uploaded in December 2021, there were 23 internal and five external code-mixing data. In this period, there was no data regarding the insertion of verbs, numbers, phrases, and clauses forthe internal code-mixingtype. Besides, there was no data on the insertion of pronouns, adverbs, numbers, phrases, basters, repetition of words, and clauses for theexternal code mixing type. Factors causing code mixing included speaker factors and linguistic factors.