[iOS] Error while reading movie during project import

**Bug description**

Hi! I have a simple test project, which should start a video play on my raw image component after app starts. However after CICD the video is gone and I've found the following log:

> Start importing Assets/iPhone_final_1920x1080.mp4 using Guid(4a6cabe8c82444838bfda281abe35b82) Importer(-1,00000000000000000000000000000000) Error while reading movie: /github/workspace/Assets/iPhone_final_1920x1080.mp4 -> (artifact id: '64692c41f188253627aa45a741fde930') in 0.001871 seconds

MP4 file was added to LFS, if it is important.

My build pipeline:

```
name: AppStore CICD

on: workflow_dispatch

jobs:
buildForiOSPlatform:
name: Build for iOS
runs-on: ubuntu-latest
strategy:
fail-fast: false
matrix:
unityVersion:
- 2021.3.16f1
targetPlatform:
- iOS

steps:
#Checkout (without LFS)
- name: Checkout
uses: actions/checkout@v2

# Git LFS
- name: Create LFS file list
run: git lfs ls-files -l | cut -d' ' -f1 | sort > .lfs-assets-id

- name: Restore LFS cache
uses: actions/cache@v2
id: lfs-cache
with:
path: .git/lfs
key: ${{ runner.os }}-lfs-${{ hashFiles('.lfs-assets-id') }}

- name: Git LFS Pull
run: |
git lfs pull
git add .
git reset --hard

#Cache
- name: Cache Library folder
uses: actions/cache@v2
with:
path: Library
key: Library-${{ hashFiles('Assets/**', 'Packages/**', 'ProjectSettings/**') }}
restore-keys: |
Library-

#Build
- name: Build project
uses: game-ci/unity-builder@v2
env:
UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
with:
unityVersion: ${{ matrix.unityVersion }}
targetPlatform: ${{ matrix.targetPlatform }}
allowDirtyBuild: true
#customParameters: '-myParameter myValue -myBoolean -ThirdParameter andItsValue'

#Output
- name: Get Artefacts
uses: actions/upload-artifact@v2
with:
name: build-iOS
path: build/iOS

releaseToAppStore:
name: Release to the App Store
runs-on: macos-latest
needs: buildForiOSPlatform
steps:
- name: Checkout Repository
uses: actions/checkout@v2

- name: Download iOS Artifact
uses: actions/download-artifact@v2
with:
name: build-iOS
path: build/iOS

- name: Fix File Permissions and Run fastlane
env:
APPLE_CONNECT_EMAIL: ${{ secrets.APPLE_CONNECT_EMAIL }}
APPLE_DEVELOPER_EMAIL: ${{ secrets.APPLE_DEVELOPER_EMAIL }}
APPLE_TEAM_ID: ${{ secrets.APPLE_TEAM_ID }}

MATCH_REPOSITORY: ${{ secrets.MATCH_REPOSITORY }}
MATCH_DEPLOY_KEY: ${{ secrets.MATCH_DEPLOY_KEY }}
MATCH_PASSWORD: ${{ secrets.MATCH_PASSWORD }}

APPSTORE_ISSUER_ID: ${{ secrets.APPSTORE_ISSUER_ID }}
APPSTORE_KEY_ID: ${{ secrets.APPSTORE_KEY_ID }}
APPSTORE_P8: ${{ secrets.APPSTORE_P8 }}

IOS_BUILD_PATH: ${{ format('{0}/build/iOS', github.workspace) }}
IOS_BUNDLE_ID: com.AytoMaximo.GameCI # Change it to match your Unity bundle id
PROJECT_NAME: GameCI # Change it to match your project's name
run: |
eval "$(ssh-agent -s)"
ssh-add - <<< "${MATCH_DEPLOY_KEY}"
find $IOS_BUILD_PATH -type f -name "**.sh" -exec chmod +x {} \;
bundle install
bundle exec fastlane ios beta

- name: Cleanup to avoid storage limit
if: always()
uses: geekyeggo/delete-artifact@v1
with:
name: build-iOS
```

How I can get to know what exactly is causing this error?
Thank you in advance!

Start with the reported GitHub Actions workflow, especially checkout/LFS handling and the game-ci/unity-builder@v2 step, using Unity 2021.3.16f1 and the iOS target. Reproduce the import of Assets/iPhone_final_1920x1080.mp4 and inspect the Unity build logs. Done means identifying why the movie is not read during CI and documenting or correcting the affected build path.

Written by the indexing model from the issue text.