diff --git a/src/state/CallViewModel.test.ts b/src/state/CallViewModel.test.ts
index 986abf4a..910075e6 100644
--- a/src/state/CallViewModel.test.ts
+++ b/src/state/CallViewModel.test.ts
@@ -31,7 +31,7 @@ import {
   mockLivekitRoom,
   mockLocalParticipant,
   mockMatrixRoom,
-  mockRoomMember,
+  mockMatrixRoomMember,
   mockRemoteParticipant,
   withTestScheduler,
   mockRtcMembership,
@@ -50,10 +50,10 @@ const aliceRtcMember = mockRtcMembership("@alice:example.org", "AAAA");
 const bobRtcMember = mockRtcMembership("@bob:example.org", "BBBB");
 const daveRtcMember = mockRtcMembership("@dave:example.org", "DDDD");
 
-const alice = mockRoomMember(aliceRtcMember);
-const bob = mockRoomMember(bobRtcMember);
-const carol = mockRoomMember(localRtcMember);
-const dave = mockRoomMember(daveRtcMember);
+const alice = mockMatrixRoomMember(aliceRtcMember);
+const bob = mockMatrixRoomMember(bobRtcMember);
+const carol = mockMatrixRoomMember(localRtcMember);
+const dave = mockMatrixRoomMember(daveRtcMember);
 
 const aliceId = `${alice.userId}:${aliceRtcMember.deviceId}`;
 const bobId = `${bob.userId}:${bobRtcMember.deviceId}`;
diff --git a/src/state/CallViewModel.ts b/src/state/CallViewModel.ts
index cd00e252..aaf7a585 100644
--- a/src/state/CallViewModel.ts
+++ b/src/state/CallViewModel.ts
@@ -375,12 +375,16 @@ export class CallViewModel extends ViewModel {
       }),
     );
 
-  private readonly rawRemoteParticipants = connectedParticipantsObserver(
-    this.livekitRoom,
-  ).pipe(this.scope.state());
+  /**
+   * The raw list of RemoteParticipants as reported by LiveKit
+   */
+  private readonly rawRemoteParticipants: Observable<RemoteParticipant[]> =
+    connectedParticipantsObserver(this.livekitRoom).pipe(this.scope.state());
 
-  // Lists of RemoteParticipants to "hold" on display, even if LiveKit claims that
-  // they've left
+  /**
+   * Lists of RemoteParticipants to "hold" on display, even if LiveKit claims that
+   * they've left
+   */
   private readonly remoteParticipantHolds: Observable<RemoteParticipant[][]> =
     this.connectionState.pipe(
       withLatestFrom(this.rawRemoteParticipants),
@@ -415,6 +419,9 @@ export class CallViewModel extends ViewModel {
       ),
     );
 
+  /**
+   * The RemoteParticipants including those that are being "held" on the screen
+   */
   private readonly remoteParticipants: Observable<RemoteParticipant[]> =
     combineLatest(
       [this.rawRemoteParticipants, this.remoteParticipantHolds],
@@ -436,6 +443,9 @@ export class CallViewModel extends ViewModel {
       },
     );
 
+  /**
+   * List of MediaItems that we want to display
+   */
   private readonly mediaItems: Observable<MediaItem[]> = combineLatest([
     this.remoteParticipants,
     observeParticipantMedia(this.livekitRoom.localParticipant),
@@ -541,12 +551,18 @@ export class CallViewModel extends ViewModel {
     this.scope.state(),
   );
 
+  /**
+   * List of MediaItems that we want to display, that are of type UserMedia
+   */
   private readonly userMedia: Observable<UserMedia[]> = this.mediaItems.pipe(
     map((mediaItems) =>
       mediaItems.filter((m): m is UserMedia => m instanceof UserMedia),
     ),
   );
 
+  /**
+   * List of MediaItems that we want to display, that are of type ScreenShare
+   */
   private readonly screenShares: Observable<ScreenShare[]> =
     this.mediaItems.pipe(
       map((mediaItems) =>
@@ -1021,7 +1037,7 @@ export class CallViewModel extends ViewModel {
     this.scope.state(),
   );
 
-  public readonly showFooter = this.windowMode.pipe(
+  public readonly showFooter: Observable<boolean> = this.windowMode.pipe(
     switchMap((mode) => {
       switch (mode) {
         case "pip":
diff --git a/src/utils/test.ts b/src/utils/test.ts
index cf1d9ec1..53d2a525 100644
--- a/src/utils/test.ts
+++ b/src/utils/test.ts
@@ -134,7 +134,7 @@ export function mockRtcMembership(
 // Maybe it'd be good to move this to matrix-js-sdk? Our testing needs are
 // rather simple, but if one util to mock a member is good enough for us, maybe
 // it's useful for matrix-js-sdk consumers in general.
-export function mockRoomMember(
+export function mockMatrixRoomMember(
   rtcMembership: CallMembership,
   member: Partial<RoomMember> = {},
 ): RoomMember {
@@ -192,7 +192,7 @@ export async function withLocalMedia(
   const localParticipant = mockLocalParticipant({});
   const vm = new LocalUserMediaViewModel(
     "local",
-    mockRoomMember(localRtcMember, roomMember),
+    mockMatrixRoomMember(localRtcMember, roomMember),
     of(localParticipant),
     {
       kind: E2eeType.PER_PARTICIPANT,
@@ -228,7 +228,7 @@ export async function withRemoteMedia(
   const remoteParticipant = mockRemoteParticipant(participant);
   const vm = new RemoteUserMediaViewModel(
     "remote",
-    mockRoomMember(localRtcMember, roomMember),
+    mockMatrixRoomMember(localRtcMember, roomMember),
     of(remoteParticipant),
     {
       kind: E2eeType.PER_PARTICIPANT,