I have for several years refused all attempts by Adobe to 'update' or install any of their products.

Almost any video format can be played using VLC 'videolan' or Pot Player.

For PDF I use only https://www.tracker-software.com/product/pdf-xchange-viewer (for viewing)
or https://www.tracker-software.com/product/pdf-xchange-editor for the very occasional editing.

For image manipulation, I use several... but seldom need anything as powerful as Photoshop. I have "The Gimp", which will do almost anything Photoshop does..... but it's quite a learning curve.

Irfanview, Photoscape and Arcsoft do all the editing I need.

For screenshots I love MWsnap and DuckCapture... but even fancier is PicPic... though it is payware (I'm not sure where I got my free copy)

I'm not sure all those will solve your problems, but I don't do commercial work.