DRM content playback issue in IE11 and Edge

[yuyu04]

Description

Starting with video.js version 7.5.5 on IE11 and edge, if you play DRM content using big-play-button, only sound comes out and the screen is black.
This problem is caused by the addition of a function to focus on the screen when big-play-button is clicked in 7.5.5.

7.5.5

if (this.mouseused_ && event.clientX && event.clientY) {
      silencePromise(playPromise);
      this.player_.tech(true).focus(); // Problem
      return;
    }

7.5.4

if (this.mouseused_ && event.clientX && event.clientY) {
      silencePromise(playPromise);
      // call handleFocus manually to get hotkeys working
      this.player_.handleFocus({}); // OK
      return;
    }

Steps to reproduce

Explain in detail the exact steps necessary to reproduce the issue.

1. Link to video js version 7.6.5.
2. Set DRM content to video js. ex) playready drm content
3. Click the Play Video button in the top left corner.

Results

Expected

DRM content play.

Actual

Only sound comes out and the screen is black

Error output

None

Additional Information

Please include any additional information necessary here. Including the following:

versions

videojs

7.5.5 or later versions

browsers

IE11 and Edge

OSes

windows 10

plugins