fix(replays): don't load segment 0

[michellewzhang]

Fixes #67847

Calling loadSegment(0) in the constructor works under the assumption that we'll always play the replay from the beginning; however, there's a case where the user might seek to a later part of the video before pressing play first. This was resulting in a bug where the first video was always playing even though that wasn't the right part of the video. We don't actually need to the loadSegment(0) call at all for the replay to play normally from the beginning (see last video):

BEFORE: Replay was playing first clip erroneously after seeking to later part of the video

Screen.Recording.2024-03-27.at.10.23.48.PM.mov

AFTER: Replay plays correctly if we seek to later part of the video

Screen.Recording.2024-03-28.at.2.09.54.PM.mov

Replay plays normally from beginning

Screen.Recording.2024-03-28.at.2.12.15.PM.mov

[billyvg]

👍 Though I think we will want to have the first frame of the video displayed instead of an empty panel

[michellewzhang]

👍 Though I think we will want to have the first frame of the video displayed instead of an empty panel

yup, not sure why it isn't always showing but i'll look into it!