While "miks_narodni_pesni" is likely a file name or a partial YouTube title, it aligns with their major releases from that period:

The search for a complete "feature" or specific compilation titled refers to a popular digital folk music mix released by the Bulgarian ensemble Orkestar Oniks (Оркестър Оникс). These long-form mixes (often titled as "Narodni Pesni" or "Horovodna Kitka") are common in the Balkan music scene, typically curated for celebrations and weddings. Orkestar Oniks: Musical Profile

Orkestar Oniks is a Bulgarian folk and "pop-folk" (chalga-adjacent) orchestra known for their high-energy performances of traditional Bulgarian folklore, specifically from the Thracian and Shop regions. They are a staple of the official Orkestar Oniks YouTube channel and various Balkan music streaming platforms.

While originally released earlier, their 2019 EP remains a primary source for the tracks often included in their 2022/2023 digital mixes.

You can find the full versions of these 2022–2023 mixes on: