How to change the pace of imported mov video clip in after effects
Method 1

The Last column on the right — in your pic it says растягиваться but in the English version of AE it's called Stretch — that's the one you need to modify Click on the number that says 100%.

Alternatively, select the layer and from the Layer menu choose Time>Time Stretch… (I'm not sure what it is in Russian).

Then you'll get a dialog that lets you choose the duration you want, or a stretch factor if you want to choose the playback speed.



Method 2:

Apply Time Remapping to the layer (choose Layer from the menu or Right-Click the layer and then choose Time>Enable Time Remapping or hit cmd/ctrlalt/optionT).

This will create a keyframe at the start and end of the layer.

Drag the last keyframe to the point where you want the layer to end.

Method 3

Park the playhead at the time you want the layer to end.

With the layer selected hit ctrl/commandalt/option,, which will stretch the out point to the current time.

You can do the same with the in point using ctrl/commandshift,.