• kalpayantam — arranging, ordaining
  Present participle of √kḷp (to arrange, make fit). The verb of orderly assembly. Kṛṣṇa kalpayati — He fits the suitable bride to the suitable bridegroom, exercising the cosmic ordering function on the domestic scale.
• vidhi-upayāpanam — marriage according to scripture
  Compound: vidhi (rule, scripture) + upayāpana (causing to marry). Marriage is performed by śāstric rule, not by personal choice. Gauḍīyas: even Bhagavān's own children are married vidhi-pūrvakam, dignifying scripture above sentiment.
• sadṛśaiḥ — compatible, suitable
  From sa + √dṛś (to look). Like-with-like. Marriages are matched for compatibility — kula, varṇa, guṇa. Kṛṣṇa as paterfamilias respects the same calculus śāstra prescribes for any householder.
• vibhūtibhiḥ — with opulences, pomp
  Vibhūti — manifestation of glory. Compare BG 10's vibhūti-yoga: Kṛṣṇa's opulence is itself sevā when offered up in dharmic ceremony. The marriages are vibhūti-yukta — performed with grandeur, but the grandeur is offered, not displayed.

• What duty of mine has been waiting for the right time and the right celebration?
• How can ordinary obligations be lifted into joyful occasion?

A father presiding over the betrothal of his children to suitable spouses — checking lineage, age, character, the auspicious muhūrta — is not a ceremonial figurehead; he is the chief architect of two new dharmic households. Kṛṣṇa, even at the head of the universe, takes that office seriously enough to do it Himself.