When is Polymorphism Actually Useful?

array(10) { [0]=> object(stdClass)#5231 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "1ONhXmQuWP8" ["related_video_title"]=> string(53) "Object Oriented Programming - The Four Pillars of OOP" ["posted_time"]=> string(19) "5 лет назад" ["channelName"]=> string(14) "Keep On Coding" } [1]=> object(stdClass)#5204 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "Dl-BdxNRUqs" ["related_video_title"]=> string(54) "What does larger scale software development look like?" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(12) "Web Dev Cody" } [2]=> object(stdClass)#5229 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "P5Lah3YlkpQ" ["related_video_title"]=> string(109) "Полное изучение C++ / Курс в одном видео для начинающих с нуля" ["posted_time"]=> string(25) "2 месяца назад" ["channelName"]=> string(54) "Школа itProger / Программирование" } [3]=> object(stdClass)#5236 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "YaSMkzmc_sA" ["related_video_title"]=> string(41) "The Only Time You Should Use Polymorphism" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(19) "Christopher Okhravi" } [4]=> object(stdClass)#5215 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "Yat8l37XGFA" ["related_video_title"]=> string(23) "Java Interface Tutorial" ["posted_time"]=> string(19) "5 лет назад" ["channelName"]=> string(14) "Keep On Coding" } [5]=> object(stdClass)#5233 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "TxZwqVTaCmA" ["related_video_title"]=> string(80) "SOLID ПРИНЦИПЫ простым языком (много примеров)" ["posted_time"]=> string(21) "3 года назад" ["channelName"]=> string(7) "Ulbi TV" } [6]=> object(stdClass)#5228 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "auCdqGdn2as" ["related_video_title"]=> string(46) "MUST KNOW junior role JAVA interview questions" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(14) "Keep On Coding" } [7]=> object(stdClass)#5238 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "IUqKuGNasdM" ["related_video_title"]=> string(26) "Java Classes & Objects" ["posted_time"]=> string(21) "4 года назад" ["channelName"]=> string(14) "Keep On Coding" } [8]=> object(stdClass)#5214 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "KFgwXXWT7sQ" ["related_video_title"]=> string(170) "ИИ-агенты — вот что действительно изменит разработку. Пишем ИИ-агент на Python, LangChain и GigaChat" ["posted_time"]=> string(23) "1 месяц назад" ["channelName"]=> string(29) "Диджитализируй!" } [9]=> object(stdClass)#5232 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "yRk-F2Jbwrw" ["related_video_title"]=> string(45) "Бомба в Офисе Президента" ["posted_time"]=> string(24) "11 часов назад" ["channelName"]=> string(27) "Анатолий Шарий" } }