It is correct and usable in written English.
You can use "via a presentation" when describing how information was shared or presented to an audience. Example: The new product was introduced to the investors via a presentation which highlighted its features and potential for success in the market.
The announcement was made via a presentation this morning at the Consumer Electronics Show in Las Vegas, with a post set to go up on the company blog soon.
Dr. Werner introduced the girls to the concept of groundwater via a presentation and demonstration that showed how water flows through an aquifer.
On the morning of Wednesday, the 4th of July a team of scientists over at the Cern nuclear research centre on the France-Switzerland border announced – via a presentation in Comic Sans – that they had probably (really probably; they're "99.999percentt" sure) discovered the "God Particle".
Advice may be delivered via a presentation to a large group of participants in a community gathering place.
Via a 15-minute presentation and a panel interview, I convinced them I had what it takes, and they convinced me that it would be a great opportunity.
Questions were presented one at a time via a Powerpoint presentation, and were read aloud by a research assistant who was naive as to the manipulation.
Palm's VP and software CTO Mitch Allen will give a presentation via the Web on February 25th to preview webOS and its development environment.
While the website is being offered by the network as a comprehensive resource for event times and networks, even executive producer Jim Bell sounded overwhelmed as to how viewers should parse so many schedules and viewing options ("Good luck," he joked during a presentation via satellite at Tuesday's Television Critics Assn. press tour).
Seek a therapy referral on the NHS today, and you're much more likely to end up, not in anything resembling psychoanalysis, but in a short series of highly structured meetings with a CBT practitioner, or perhaps learning methods to interrupt your "catastrophising" thinking via a PowerPoint presentation, or online.
The study information and intervention manipulations will be delivered via a video presentation viewed at baseline.
Education sessions were informal and held at the convenience of participating groups, via a standardised presentation.
