The youth are the key behind the expansion - hoped to meet demand from the rapid growth of indoor sporting codes by building five new courts for a cost of between $10 million and $12m.
Since launching the video, Pettigrew-Green Arena chairman Craig Waterhouse said they had received "amazing" feedback and support.
"A lot of people have been making comments about it being in the right direction, and fantastic for the Bay."
It was hoped the video would help spread the word about the expansion, and get community support behind it.
Financial support would also be needed - with plans to pitch to both Napier City and Hastings District councils for funding, and public fundraising. About $1m has already been raised.
The expansion has been welcomed by Sport Hawke's Bay, which is based out of the Taradale site.
When asked if they would have any input into the expansion, chairman Damon Harvey said they would in terms of ensuring the region had enough indoor court space.
"At the moment there's obviously a big shortage due to the popularity of basketball, volleyball, futsal. So like [RISEC] we see that there is a significant shortage and we support anyone that's looking at increasing court space. So it's fantastic that the Pettigrew Green are looking at it."
The expansion would be separate to the arena, and would be developed in a two-stage programme.
The first stage was expected to cost between $6.5m and $7.5m to develop three courts, hopefully in the 2018-19 year.
Unfortunately this was not soon enough, Mr Harvey said, as sports were already feeling the strain from not having space.
"But there's not a lot else we can do about that, we just have to wait for facilities to be built and obviously they take a bit of time."
In the interim, he advocated looking at how other facilities in the region could be used to alleviate the problem - including using schools, or gyms which weren't being used at certain times.
And, given the solution needed to be region-wide there was also an argument for having additional court space in facilities around the region - just as there was for having one facility.
The second stage of the expansion would bring two more courts with an expected cost of between $4.5m and $5.5m.
The costings for both stages did not include amenities, or carparking. At this stage the exact configuration of the courts had not been finalised, however they would be able to accommodate a number of sporting codes.