British Telecom has spent prodigiously on bagging sought after soccer broadcasting rights, but a tumultuousness year involving an Italian accounting scandal and a broadband battle with the UK watchdog has set some alarm bells ringing. Brushing these setbacks aside, BT casually wrote a check for £1.2 billion ($1.5 billion) earlier this year to secure Champions League soccer rights until 2021, showing just how much the UK operator is increasingly relying on its BT Sport business – a service delivered mostly OTT. BT is therefore ramping up its return on investment efforts for these major sporting events by deploying ad insertion and programmatic campaign software. This week, BT extended its deal with dynamic ad insertion (DAI) technology company Yospace – which…