i don´t know why you can´t play videos on steemace tube! I can. maybe it´s not really finished yet!
Please read this article https://steemit.com/steemace/@steem-ace/a-new-scot-tribe-on-steem-steemace-com-for-gaming-content-or-over-100k-sp-7-5k-pal-and-120-splinterlands-beta-booster-to-reward