Hulu’s announcement about enabling content downloads earlier this month might not have been a market-altering move as we know it, yet for one company, the phone hasn’t stopped ringing since the US streaming service added the deceptively not-so-simple feature. Bandwidth constraints, storage space issues and content piracy are primary concerns for OTT video service providers when assessing the cons against adding a download button – matters which continue to be addressed by US video software specialist Penthera after more than a decade in the downloadable content business. Amazon and Netflix activated the feature years ago due to popular demand and finally with Hulu joining in, business at Pittsburgh-based Penthera is booming, tying up deals at cablecos, MVPDs and OTT companies,…