Help with color problem in Premier Pro

Ann's correct. It's a simple color management thing.

You have phone clips that are in HLG, a form of HDR. And apparently used on an SDR/Rec.709 sequence.

So ... the Color Workspace/Lumetri panel/Settings tab is where ALL CM stuff 'sits' these days.

Make sure that Display Color Managment is on, as is auto log detect and auto tonemap.

Check the Sequence CM, should be set to Rec.709/SDR. Monitor should be set for Rec.709 also.

And use presets that do not have HLG or PQ in the preset name. This way you get SDR/Rec.709 presets.

As for your display gamma settings in the CM ... if you're on a Mac, that's ... tougher. Because Apple uses a non-standard display transform for Rec.709 video unless you are using a newer Mac with 'reference modes" for the monitor, and set it to 'HDTV' ... which will get straight and correct Rec.709 displaying on the monitor.

For most current Macs, you don't have that. So your monitor will normally be set to use the equivalent to gamma 1.96 in QuickTime Player, Chrome, and Safari. But in VLC, which does not allow Apple to control the display, you'll see gamma 2.4. The "normally expected" Rec.709 display transform.

Gamma 1.96 applied as a display transform lightens the shadows considerably. So if you set the Premiere monitor/display gamma to QuickTime 1.96, the exported file in QT player, Chrome, and Safari, will be similar to what you see in Premiere. Some Mac users only care about other Mac viewing, so ... if that floats your boat, go for it.

Some use the broadcast display 2.4 setting because ... well, it looks correct on correctly setup systems, and basically nearly all non-Mac screens. And let it be what it is on Mac screens.

Some use the "web gamma 2.2" setting, as it's kinda in-between in visual appearance, not as far off on either as the other two options.

Your choice.

It all has to do with color management.

Tone mapping in Premiere Pro

Color management in Premiere Pro

The name of a window/panel is always in the left top corner.