Hypernym for "heard", "seen", and "visited"

Solution 1:

Mark it as accessed. Date last accessed is a very common phrase in computing.

Access — M-W

verb To open or load (a computer file, an Internet site, etc.)
"accessed the computer by phone"

Access — Macmillan

verb 1. To get information, especially from a computer
"The database allows you to access the sales figures in a number of ways."

Solution 2:

For hyperlinks, the right word would be visited.

However, if you have a catalog of music/video/products, you could have a "Previously viewed" (last viewed, last visited, previously visited) section like amazon.com does.

Solution 3:

You may mark it as experienced.

The user (already) experienced this content.

Websters:

Experience v. t.

1. To make practical acquaintance with; to try personally; to prove by use or trial; to have trial of; to have the lot or fortune of; to have befall one; to be affected by; to feel; as, to experience pain or pleasure; to experience poverty; to experience a change of views.

A usage example from BBC:

In addition, the study measured the second-by-second facial movements of people as they experienced the content to measure true engagement and the ...

Solution 4:

This activity is usually referred to as content consumption or media consumption by content/media producers.

Media consumption or media diet is the sum of information and entertainment media taken in by an individual or group. It includes activities such as interacting with new media, reading books and magazines, watching television and film, and listening to radio.

If your audience for this copy are media producers consume would be my word of choice.

Individuals don't typically use an umbrella term for these activities as they are typically siloed. I read books on my Kindle, audio on my streaming app (Deezer) and I watch videos on YouTube. However, In Trinidad and Tobago dialect we use the phrase take in (where in is pronounced as een) as a synonym for this use of consume. So, one may say "Let me take in some music" or "I went to the cinema to take in a movie".

Including emphasis, you can see the following excerpt from the Wikipedia entry for media consumption uses this phrasal verb.

Media consumption or media diet is the sum of information and entertainment media taken in by an individual or group.

So if your reader is doing the consumption I would suggest took in.

Merriam Webster

7. to receive into the mind : perceive

Wiktionary

6. (transitive) To absorb or comprehend.

   I was so sleepy that I hardly took in any of the lecture.

Solution 5:

To my way of thinking, web sites have a "visit" count. Components of the web site would have a "uses" count, incrementing each time the component was used.

Or "consumed".

I guess it depends on how you're representing that data. I'd advise you to take a look at various video/audio streaming sites and see how they represent their stats in the same context as you're using. After all, they've done the legwork for you and it's in a language that many people understand.