That's because there was no "call to action." A viewer will not come to your church if you do not invite them or easily offer the address with clarity and obtainability.
I'm not sure what's next...
Even if your storytelling and theology are compelling, the viewer can get dropped off after the video’s ride with no entry ticket or directions of where to go next. Don't assume that since the video is hosted on your website, you do not have to place a call to action since all the info is a click away. Remember, once your video goes live through youtube or vimeo, it may be shared on other platforms, meaning that viewers will not be watching it on your church’s website. Your video, therefore, must have a call to action that will engage them with your church.
At the retail television network HSN, newly hired hosts spend 3 days training on their CTA. Why? Hosts can deliver a perfect product presentation, but if they cannot deliver a call to action, next to no one will call in to buy the product. The host literally has to tell the viewer to buy the product for a transaction to happen. If not, they are just entertainment.
The same applies to your welcome video. If there is no invitation, then you are just entertainment. There must be a moment where you literally invite the viewers to your church. Tell them to come.