What is SEM

array(10) { [0]=> object(stdClass)#4306 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "N6DW31S_oyI" ["related_video_title"]=> string(93) "Mega Hits 2025 🌱 The Best Of Vocal Deep House Music Mix 2025 🌱 Summer Music Mix 2025 #4" ["posted_time"]=> string(27) "5 месяцев назад" ["channelName"]=> string(11) "Helios Deep" } [1]=> object(stdClass)#4279 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "OSZp9RMhf8Y" ["related_video_title"]=> string(99) "1945: Победа / Вторая мировая война / Уроки истории @MINAEVLIVE" ["posted_time"]=> string(23) "1 месяц назад" ["channelName"]=> string(17) "МИНАЕВ LIVE" } [2]=> object(stdClass)#4304 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "2X1iIrjz7ug" ["related_video_title"]=> string(67) "Президент сбежал / Столица атакована" ["posted_time"]=> string(24) "16 часов назад" ["channelName"]=> string(10) "NEXTA Live" } [3]=> object(stdClass)#4311 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "aircAruvnKk" ["related_video_title"]=> string(101) "Но что такое нейронная сеть? | Глава 1. Глубокое обучение" ["posted_time"]=> string(19) "7 лет назад" ["channelName"]=> string(11) "3Blue1Brown" } [4]=> object(stdClass)#4290 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "iTB3mCIBWMA" ["related_video_title"]=> string(60) "Morning Vibes Playlist ☕ Feel Good Music to Lift Your Mood" ["posted_time"]=> string(27) "5 месяцев назад" ["channelName"]=> string(14) "We Are Diamond" } [5]=> object(stdClass)#4308 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "k5tu-noXroE" ["related_video_title"]=> string(100) "🤬 Страшная ПРАВДА про ОБСТРЕЛ КИЕВА и Украины / Свитан" ["posted_time"]=> string(24) "12 часов назад" ["channelName"]=> string(19) "Апостроф TV" } [6]=> object(stdClass)#4303 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "mKu6FI53BxE" ["related_video_title"]=> string(92) "Google Analytics 4 tutorial for beginners (2025) || GA4 tutorial for beginners || GA4 course" ["posted_time"]=> string(27) "5 месяцев назад" ["channelName"]=> string(48) "Analytics Mania - Google Analytics & Tag Manager" } [7]=> object(stdClass)#4313 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "KLzMZT-jZIc" ["related_video_title"]=> string(77) "Развязка в войне / Принято срочное решение" ["posted_time"]=> string(21) "2 часа назад" ["channelName"]=> string(10) "NEXTA Live" } [8]=> object(stdClass)#4289 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "nec3aZM8aUY" ["related_video_title"]=> string(83) "Deep House Mix 2024 | Deep House, Vocal House, Nu Disco, Chillout Mix by Diamond #3" ["posted_time"]=> string(19) "1 год назад" ["channelName"]=> string(7) "Diamond" } [9]=> object(stdClass)#4307 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "AF8LSurfct4" ["related_video_title"]=> string(68) "Programming ▫️ Coding ▫️ Hacking ▫️ Designing Music 🦠" ["posted_time"]=> string(28) "10 месяцев назад" ["channelName"]=> string(6) "FilFar" } }