TikTok is different for sure, but 30 seconds of a dance clip would probably be all it takes to get some views. Also, if you have any lessons recorded, those can make for great source material, if you can find 30-90 second snippets of them that can stand alone.

What you do is show the viewer what they want to see, which is an activity that they fantasize about doing right now rather than being stuck at work or whatever. Then, in the caption, you put your advertising material such as the name of your group and a link to your web site.

I don't have energy for any of this myself, but what I see in people who do post a lot is that they integrate it in their lives in a way that it's not much of hassle to make a post. Commonly they will say they will stop doing it if it ever becomes like a job, like something they have to do rather than something they do spontaneously when they get an idea. While some of them get into the complex recording setups and/or do a lot of video editing after the recording, it seems more common that people randomly open the app and press the little plus-sign button when an idea occurs to them.