Begin moving video channel to actor

...+admin/follows/followers-list/followers-list.component.ts

...+admin/follows/following-list/following-list.component.ts

client/src/app/core/auth/auth.service.ts

client/src/app/shared/account/account.model.ts

client/src/app/shared/video/video-details.model.ts

client/src/app/shared/video/video.model.ts

scripts/update-host.ts

server.ts

server/controllers/activitypub/client.ts

server/controllers/activitypub/inbox.ts

server/controllers/activitypub/outbox.ts

server/controllers/api/server/follows.ts

server/controllers/api/users.ts

server/controllers/api/videos/abuse.ts

server/controllers/api/videos/channel.ts

server/controllers/api/videos/index.ts

server/controllers/static.ts

server/controllers/webfinger.ts

server/helpers/activitypub.ts

server/helpers/custom-validators/activitypub/activity.ts