refactor!: rename VideoItem/VideoPlayerDetails.length to duration for consistency

testfiles/player_model/hdr.json

@@ -3,7 +3,7 @@
     "id": "LXb3EKWsInQ",
     "name": "COSTA RICA IN 4K 60fps HDR (ULTRA HD)",
     "description": "We've re-mastered and re-uploaded our favorite video in HDR!\n\nCHECK OUT OUR MOST POPULAR VIDEO: https://youtu.be/tO01J-M3g0U\n► INSTAGRAM: http://www.instagram.com/mysterybox\n► INSTAGRAM: http://www.instagram.com/jacobschwarz\n►WEBSITE: http://www.mysterybox.us\n►FACEBOOK: https://www.facebook.com/mysteryboxdi...\n\nMake sure to follow us on Instagram for BTS and sneak-peaks at upcoming projects. \n\nLICENSING & BUSINESS INQUIRIES\n► contact@mysterybox.us\n\nCHECK OUT OUR VIDEO PRODUCTION COMPANY\n► https://www.mysterybox.us\n\n4K PLAYLISTS\n► https://www.youtube.com/playlist?list...\n\nBLOG Check out our blog for great information on working in HDR and 8K. \n► http://www.mysterybox.us/blog\n\nSUBSCRIBE FOR MORE VIDS\n►https://www.youtube.com/user/jacobsch...\n\nMUSIC\n► Storyworks Music \"Promise of Dawn\"\nhttps://soundcloud.com/joshuapeterson/promise-of-dawn\nwww.storyworksmusic.com\n\n► SHOT ON\nRed Weapon LE w/Helium 8K s35 sensor (Stormtrooper33)\nCanon 16-35mm III  \nCanon 24-70mm II\nSigma 150-500mm\nZeiss Classic 15mm\nMOVI M10\nAdobe Premiere and DaVinci Resolve\n\n\n\nLICENSING & BUSINESS INQUIRIES\n► contact@mysterybox.us\n\nThis video is subject to copyright owned by Mystery Box LLC. Any reproduction or republication of all or part of this video is expressly prohibited, unless Mystery Box has explicitly granted its prior written consent. All other rights reserved.\n\nCopyright © 2017 Mystery Box, LLC. All Rights Reserved.",
-    "length": 314,
+    "duration": 314,
     "thumbnail": [
       {
         "url": "https://i.ytimg.com/vi/LXb3EKWsInQ/hqdefault.jpg?sqp=-oaymwEbCKgBEF5IVfKriqkDDggBFQAAiEIYAXABwAEG&rs=AOn4CLC0YPk1n3EyXOsJxvBcJsAgR1umog",

testfiles/player_model/multilanguage.json

@@ -3,7 +3,7 @@
     "id": "tVWWp1PqDus",
     "name": "100 Boys Vs 100 Girls For $500,000",
     "description": "Giving away $25k on Current! Sign up and use my code “BEAST250” for a chance to win*: https://www.current.com/beast250\n\nSUBSCRIBE OR I TAKE YOUR DOG\n╔═╦╗╔╦╗╔═╦═╦╦╦╦╗╔═╗\n║╚╣║║║╚╣╚╣╔╣╔╣║╚╣═╣ \n╠╗║╚╝║║╠╗║╚╣║║║║║═╣\n╚═╩══╩═╩═╩═╩╝╚╩═╩═╝\n\n----------------------------------------------------------------\nfollow all of these or i will kick you\n• TikTok - https://www.tiktok.com/@mrbeast\n• Twitter - https://twitter.com/MrBeast\n• Instagram - https://www.instagram.com/mrbeast\n• Facebook - https://www.facebook.com/MrBeast6000/\n• Official Merch  - https://www.shopmrbeast.com/\n• Beast Philanthropy - https://www.beastphilanthropy.org/\n\nText me @ +1 (917) 259-6364\nI'm Hiring! - https://www.mrbeastjobs.com/\nOrder a beast burger 🍔 -  https://mrbeastburger.com\nChocolate 🍫 Win a Tesla or be in a MrBeast video - Buy now ▸ https://feastables.com\n-----------------------------------------------------------------—\n\nCurrent is a financial technology company, not a bank. Banking services provided by Choice Financial Group, Member FDIC. The Current Visa Debit Card is issued by Choice Financial Group pursuant to a license from Visa U.S.A. Inc. and may be used everywhere Visa debit cards are accepted.\n\n*NO PURCHASE OR PAYMENT NECESSARY TO ENTER OR WIN. Open to legal residents of the 50 U.S./D.C., age 18+ (19+ in AL and NE, 21+ in MS). Void outside the 50 U.S./D.C. and where prohibited. Sweepstakes starts at 12:00:01 AM ET on 7/9/22; ends at 11:59:59 PM ET on 10/9/22. Odds of winning will depend upon the number of eligible entries received. For full Official Rules and how to enter without becoming a Current member, visit https://www.current.com/beast250. Sponsor: Finco Services, Inc. d/b/a Current, 30 Cooper Square, Floor 4, New York, NY 10003.",
-    "length": 1013,
+    "duration": 1013,
     "thumbnail": [
       {
         "url": "https://i.ytimg.com/vi/tVWWp1PqDus/hqdefault.jpg?sqp=-oaymwEbCKgBEF5IVfKriqkDDggBFQAAiEIYAXABwAEG&rs=AOn4CLBg0pFmrd-KeoxX0Hb_lF9mvekfsw",