Yes, they look like proper containers (but I see no problem calling them suitcases by the witness), no problem there (maybe missing seals though ?) as you say ... everything else on the video is beyond suspicious.

EDIT: Yeah, the election officials call the containers suitcases as well in their cover up lies "If you look at the video tape, the work you see is the work you would expect, which is you take the sealed suitcase looking things in, you place the ballots on the scanner in manageable batches and you scan them." https://leadstories.com/hoax-alert/2020/12/fact-check-video-from-ga-does-not-show-suitcases-filled-with-ballots-pulled-from-under-a-table-after-poll-workers-dismissed.html

Yes, they look like proper containers (but I see no problem calling them suitcases by the witness), no problem there (maybe missing seals though ?) as you say ... everything else on the video is beyond suspicious.