There will be detail of TV broadcasting arrangements in the threads for individual games, where relevant - but it looks like the main way to watch home and away games will be through the AFL site:
Looking at the VFL round by round site, here https://www.afl.com.au/fixture?Competit ... Venues=100VFL broadcast partner the Seven Network will show a weekly game plus finals, live and free on 7 in Victoria and 7Plus nationally. Fans can catch up from anywhere around the nation on 7plus.
In Round One, Seven will broadcast the Collingwood v Box Hill Hawks match at Victoria Park at 12:10pm on Sunday 27 March. In Round Two, it will be Sandringham v Richmond at Wilson Storage Trevor Barker Beach Oval at 12:00pm on Sunday 3 April.
it seems that the live stream is just that - the videos available there for the two completed games are just "mini-matches" (5 minute highlights) and a focus on some player or other for a couple of minutes. So, subject to what the Club makes available, you probably have to watch the live stream actually live if the game isn't on TV.