American servers can provide good performance in building video websites, but whether they will freeze depends on many factors. Here are some factors that may affect video website performance and how to optimize to avoid lag issues:

　　Server performance: Make sure to choose a high-performance server with sufficient processing power, memory and bandwidth. If the video website has a large number of visits, you can consider using a server with GPU acceleration to provide a smoother video playback experience.

　　Bandwidth and network quality: Ensure that the bandwidth of the server is sufficient to meet the high-speed transmission requirements of video content. At the same time, network configuration and routing are optimized to ensure low network latency and reduce lagging.

　　Video compression and encoding: Use appropriate video compression and encoding techniques to reduce video file size, reduce transmission delays, and improve playback efficiency.

　　Content Distribution Network (CDN): Using CDN, video content can be distributed to different nodes around the world, reducing access delays, improving loading speed, thereby reducing lag issues.

　　Caching and preloading: By using caching and preloading technology, video content can be loaded in advance before users access it, improving video loading speed and smoothness.

　　Streaming media technology: Consider using streaming media technology, such as HLS (HTTP Live Streaming) or DASH (Dynamic Adaptive Streaming over HTTP), to dynamically adjust video quality according to the user's network conditions and avoid lagging.

　　Server optimization: Optimize the server, including database configuration, server cache, etc., to improve overall performance.

　　Monitoring and tuning: Regularly monitor server performance, identify potential performance issues, and perform timely tuning and optimization.

　　Generally speaking, American servers can well support the construction of video websites, but success depends on how to correctly configure and optimize the server, and make reasonable use of various optimization technologies to provide a stable video playback experience.