I really like this post.

I've been doing this for a few months myself : < 1.5 min videos for products I'm working on then I share the video around - and after a few iterations can post it to a website.

I've been doing a "story style" voice narration over my videos "Meet _________ she's a ________ that needs to accomplish _________. Product _______ helps her do that ....."

that said - I like the OP's non narration style too : Headline -> product screen -> headline ..."

Here is a summary of the tools and process I use on windows 10:

1) write down the narrated story in a google doc - with individual, numbered "scenes" ..these will be only 1-3 sentences each.

2) practice narrating into Audacity (an audio tool). A decent mic is a good idea - I use a Samson Q2U.

3) iterate on #1 & #2 over and over until you get the text and time to be < 1.5 mins. This is harder than it seems and listening to one's own voice is grating ;)

4) export to mp3 and share with some friends/family to make sure the audio and intonation sounds good. (hint: before exporting, use Audacity's "Normalize" effect .this will attempt to bring the audio to a 0db level which is helpful in the video editing phase when mixing with background music and the audio ducking features).

4.5) once you have the audio narration wrapped up, export audio into individual audio clips for each scene in the written story. This helps if you want to move things around at video editing time.

5) product mockups are done in draw.io , then I just grab the a screen shot of the product mockup screens to be included in the video.

6) screen recordings with a real product / desktop etc are grabbed using OBS (open broadcaster software). This is a GREAT package and works great with single or multi-monitor setup as well as multiple webcam sources all at once if you need them (ex. to show mobile / hardware / physical product along side the desktop software).

7) I bring in other scene images purchased from Shutterstock. This is KEY if you want to have the same actor in different scenes throughout the video; and its hard to get this from the free image sites like pixabay. If there is one thing to spend money on in this whole process - its shutterstock - I can't emphasize this enough. Seriously - the images are great and seem to almost be ready made for this kind of activity.

8) Background music - just like the OP - youtube audio library is awesome : https://www.youtube.com/audiolibrary/music

9) Video editing (remember we're talking windows 10 here) - I use Pinnacle studio 22 - its decent once you get through all the very frustrating UI bugs and bugs in encoded output. I like it for the pan & zoom effects (think Ken Burns effect) and audio ducking. If you don't buy a package, try starting with the free Davinci Resolve - its pretty good and what I would use if starting over. (in fact the only reason I purchased Pinnacle was becuase I forgot about Davinci Resolve)

9.5) putting it all together in video is a matter of dropping in all the images from shutterstock, screen shots of draw.io mockups, obs video captures, background music and narrated audio clips - and then spending HOURS (I'm still a novice) getting the transitions and audio lined up just right.

9.6) use "audio ducking" to cause the background music to go down in level when the voice narration is present and go up in level during transitions or non-narrated demo sections.

hope this helps...