Why didn't my cake rise? How to get a perfectly risen cake!

array(10) { [0]=> object(stdClass)#4611 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "BIiMWLadwAI" ["related_video_title"]=> string(58) "Top 10 secrets to light and fluffy cakes! | Cake Chemistry" ["posted_time"]=> string(19) "5 лет назад" ["channelName"]=> string(24) "Claire Elizabeth Creates" } [1]=> object(stdClass)#4584 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "DBfThSfa1Mg" ["related_video_title"]=> string(39) "K-고구마케이크. Sweet Potato Cake" ["posted_time"]=> string(21) "4 года назад" ["channelName"]=> string(13) "Maison Olivia" } [2]=> object(stdClass)#4609 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "206O5P7_uwE" ["related_video_title"]=> string(81) "Hayley was shocked to discover she had an inoperable brain tumor Byeond the Gates" ["posted_time"]=> string(26) "41 минуту назад" ["channelName"]=> string(16) "Beyond the Gates" } [3]=> object(stdClass)#4616 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "8H_8DVDQ4Qk" ["related_video_title"]=> string(99) "СЕКС-СИМВОЛЫ 80-90-х, ТОГДА И СЕЙЧАС: SANDRA, SABRINA, C.C.CATCH, KIM WILDE" ["posted_time"]=> string(25) "3 недели назад" ["channelName"]=> string(63) "Познавательное и Развлекательное " } [4]=> object(stdClass)#4595 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "8MsmytRzYas" ["related_video_title"]=> string(72) "Mochi mit Erdbeeren und Milch! Frühstücksdessert zum Abnehmen!" ["posted_time"]=> string(25) "4 недели назад" ["channelName"]=> string(23) "Köstliche Milchrezepte" } [5]=> object(stdClass)#4613 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "Pg9LVwqgdc8" ["related_video_title"]=> string(97) "MAKE YOUR CAKE BATTER RISE by doing these and avoid Cake fails. #oluchiimoh #cakebatter #cakefail" ["posted_time"]=> string(21) "3 года назад" ["channelName"]=> string(11) "Oluchi Imoh" } [6]=> object(stdClass)#4608 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "w_sROkaZea0" ["related_video_title"]=> string(131) "Торт «Сказка» по ГОСТу: бисквитный торт с кремом. Пошаговый рецепт" ["posted_time"]=> string(23) "1 месяц назад" ["channelName"]=> string(14) "Family Cooking" } [7]=> object(stdClass)#4618 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "jyFdB6QRimI" ["related_video_title"]=> string(101) "WHAT'S WRONG WITH MY SPONGE CAKE? Bake Perfect Cakes every time Recipe & Tutorial | Cupcake Jemma" ["posted_time"]=> string(19) "5 лет назад" ["channelName"]=> string(12) "CupcakeJemma" } [8]=> object(stdClass)#4594 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "QFfh7z0KwVA" ["related_video_title"]=> string(86) "Популярный ДУБАЙСКИЙ ЧИЗКЕЙК Торт БЕЗ ВЫПЕЧКИ" ["posted_time"]=> string(25) "3 недели назад" ["channelName"]=> string(11) "Alex&Milana" } [9]=> object(stdClass)#4612 (5) { ["video_id"]=> int(9999999) ["related_video_id"]=> string(11) "jlcscgmKipE" ["related_video_title"]=> string(71) "How to bake a DELICIOUS Victoria Sandwich | Paul Hollywood's Easy Bakes" ["posted_time"]=> string(21) "3 года назад" ["channelName"]=> string(14) "Paul Hollywood" } }