Shouldn't take long. Google "screencast software". Record yourself: "Hi, this is Henri. Let show you how find bugs with BugJail..." Do a 3-minute video with some simple examples. Put it on YouTube and embed it in your site.
If I were doing it, I'd budget 4-8 hours of work and close to zero cost.
There is some reference to a beta in 2018. Should remove that.
Also, a video of the thing in use would be helpful. Put it right up at the top. Show me something I can't do now. Include specific examples.