How do I set up podcast tracking?

Question

Podcasts

There is a site with nuxt.js components connected to google tag manager. The site has a podcast section. Tasks:
A) track the loading of the player (done);
B) track the playback of the podcast (start, but on click is problematic, since start and pause are one button and one element in the dom);
C) track listening for 3 seconds;
D) track the quantile (25%, 50%, 75%, and 100% listening to the podcast recording).
The podcast on the site is issued from the audio tag with id. Not stream. Linked file.
What was done:
A) I tried to bind to the timeupdate event: when clicking on the start, add to the audio event listener on timeupdate, which calculated the time and percentage of listening on the go. Accordingly, if a second is listened to, then sending the target that the player is running. 3 seconds - also sending. Well, I counted the quantile on the go. Presumably I am in conflict with the existing timeupdate handler in the nuxt component (I try to import my handler through the gtm container, because neither ftp nor other levers were delivered);
B) I tried to connect to the loading of the player and every second to break through the listened time and count the percentage. It also doesn't work.
Every time a new container is published to the site, a script error is regularly displayed (some component tries to poll the container and gets a 404).
Tell me what I'm doing wrong, is it really possible to do this and how? I will be glad for your comments
Ps: I started goals, events, etc. in analytics engines, if anything