佉 訶 囉 嚩 阿 kha, ha, ra, va, a, the five 種子 roots, or seed-tones of the five elements, space, wind, fire, water, earth respectively. From the Dictionary of Buddhist Terms by Soothill and Hodous: https://mahajana.net/texts/soothill-hodous.html

Introduction If we pray to Kwan Seum Bosal to remove our “karmic obstructions” (as discussed in the previous section), well, what if it actually works? Once these karmic obstructions are removed, or at least reduced, what is it that we are now able to do. That is, what was, but now is not, being obstructed? […]

There is a much shorter mantra in the Korean tradition with the same title. But this video is of a different, longer version used today in China. It is a really lovely video in which a mother is teaching the mantra to her daughter. 補闕真言 南無喝囉怛那，哆囉夜耶。 佉囉佉囉。俱住俱住。 摩囉摩囉。虎囉，吽。賀賀， 蘇怛拏，吽。潑抹拏，娑婆訶。 nā mó hē là dá nà […]