[MV] Min Kyunghoon & Heechul (feat. BIBI, ATEEZ) - Hanryang

Missed this one at the end of the year. Came out of this Knowing Brothers offshoot show. Track produced by DinDin with Shindong as MV director.

[MV] Woojoo jjokkomi (Kim Heechul & Lee Soogeun) - White Winter

You can count on Heechul to bring together the weirdest collabs.
And have ITZY show up in an SM Ent. MV. LOL!!!

[MV] Heechul - Old Movie

[MV] Min Kyunghoon X Heechul - Falling Blossoms

Much more serious subject matter here compared to the others. Heechul features in the MV as a developmentally disabled person.
This is one of the three videos created for the Seollal (Korean New Year) Special episode of Knowing Brothers, which is a popular variety show.

[MV] Heechul, Shindong, Eunhyuk, Solar - Charm of Life

Station2 #35

Entirely parody.

[MV] EVE (feat. Heechul) - Melody

I had no idea EVE was still a thing. Been a while.

[MV] Heechul X Min Kyunghoon - Sweet Dream

Station #41

Oh, heavens. Lol. This is related to episode 51 of Knowing Brothers. It's a show hosted by a bunch of celebrity dudes who have all been through big scandals. They're mostly taking the piss out of each other the whole time.

The woman featured in the MV is Twice's Momo.

[MV] Heechul & Jungmo - Ulsanbawi

Vagrant bum Heechul. Kek.

[MV] Heechul X Jungmo X Wheein - Narcissus

Station #10

Heechul of Super Junior and Wheein of MAMAMOO on vocals, plus Kim Jungmo of TRAX as guitarist and producer.

Interesting collab!
Heechul and Jungmo have done a few rock collabs over the years (M&D) and Wheein's voice adds a whole new awesome flavor to the mix.