Feature request: Add video "start at" time to YouTube assets in TCMS/Blox

We've had a few requests lately regarding YouTube video embeds with a specific start time in the video. For example, one story we had was about political candidates, and we wanted to add video clips of each candidate talking about a specific topic. There's a long video of a candidate forum, but instead of embedding the video from its start and making viewers watch through the whole thing, we wanted to jump to the specific times that each candidate was speaking (see the video below). We ended up having to use HTML assets instead.