lightroom will not access develop module

[Nature Light]

From time to time Lightroom loses its mind when switching between photos or switching from Library to Develop.  See the attached video.  This is random and I cannot discern any cause and effect relationship.  I use the program every single say and it can happen every day for a couple days, or weeks can go by before it happens again.  This was going on before the latest update.  I am using Windows 10 Pro 64 bit and latest version of Lightroom.  The only way to "fix" the problem is to close Lightroom and relaunch.  Clearly not a satisfactory way to work.  Well, defeated again.  I cannot load the video because I don't have a url or no how to create one for a screen capture video I have stored on my hard drive.  If someone emails me with an answer I can then reply and attach the video.  This is most frustrating.

[Per Berntsen]

Click the video icon in the toolbar to insert a video.

If it's too large to insert, attach it instead. 

[Nature Light]

Clicking on that icon requests a url as I stated.  I don't have a url.  It's a screen grab video mp4 on my hard drive.  And attaching also asks for a url so your suggestions did not solve the problem,  but thanks anyway.

[dj_paige]

Upload the video to a file sharing service (such as DropBox) and use the URL from there.

[johnrellis]

[This post contains formatting and embedded images that don't appear in email. View the post in your Web browser.]

If the video is 47 MB or smaller, you can attach it here using the attachment box at the bottom of the reply box:

[Nature Light]

Thanks!  This is very helpful.  I don't know how I missed that box.

[Nature Light]

OK...here is the video.  Thanks to all who helped.

[johnrellis]

Try resetting LR's preferences:
https://www.lightroomqueen.com/articles-page/how-do-i-reset-lightrooms-preferences/

LR sometimes soils its preferences file, and resetting it can fix all sorts of wonky behavior. That article explains how to restore the old preferences if resetting doesn't help.